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Topical›Chemistry 9701›Atoms, molecules and stoichiometry›Reacting masses and volumes (of solutions and gases)›Paper 1

Reacting masses and volumes (of solutions and gases) — Paper 1 · A Level Chemistry 9701

2.4· 300 questions · 300 marks · 360 min · 2005–2025· Multiple choice

Every Cambridge A Level Chemistry Paper 1 question on reacting masses and volumes (of solutions and gases), laid out as 66 A4 pages with the mark scheme below. Nothing is left out. Free to read, no account.

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Question 1: The petrol additive tetraethyl-lead(IV), Pb(C2H5)4, is now banned in many countries. When it is completely burned in air, lead(II) oxide, C…Question 2: Use of the Data Booklet is relevant to this question. What volume of oxygen, measured under room conditions, can be obtained from the therm…Question 3: N2O4 is a poisonous gas. It can be disposed of safely by reaction with sodium hydroxide. N2O4(g) + 2NaOH(aq) → NaNO3(aq) + NaNO2(aq) + H2O(…Question 4: Use of the Data Booklet is relevant to this question. What mass of solid residue can be obtained from the thermal decomposition of 4.10 g o…1 / 66
Question 5: The amount of calcium ions in a sample of natural water can be determined by using an ion- exchange column as shown in the diagram. water s…2 / 66
Question 6: Samples of 10 cm3 of each of the first four members of the alkane series are separately mixed with 70 cm3 of oxygen. Each is then burned an…Question 7: The equilibrium constant, Kc, for the reaction to form ethyl ethanoate from ethanol and ethanoic acid, C2H5OH + CH3CO2H CH3CO2C2H5 + H2O, a…Question 8: A 5.00 g sample of an anhydrous Group II metal nitrate loses 3.29 g in mass on strong heating. Which metal is present? A magnesium B calciu…3 / 66
Question 9: The first stage in the manufacture of nitric acid is the oxidation of ammonia by oxygen. wNH3(g) + xO2(g) → yNO(g) + zH2O(g) Which values f…Question 10: Nitrogen dioxide decomposes on heating according to the following equation. 2NO2(g) 2NO(g) + O2(g) When 4 mol of nitrogen dioxide were put …Question 11: In the Basic Oxygen steel-making process the P4O10 impurity is removed by reacting it with calcium oxide. The only product of this reaction…Question 12: Use of the Data Booklet is relevant to this question. A typical solid fertiliser for use with household plants and shrubs contains the elem…Question 13: The density of ice is 1.00 g cm–3. What is the volume of steam produced when 1.00 cm3 of ice is heated to 323 °C (596 K) at a pressure of o…4 / 66
Question 14: Use of the Data Booklet is relevant to this question. The combustion of fossil fuels is a major source of increasing atmospheric carbon dio…Question 15: For complete combustion, 1 mol of an organic compound X was found to require 2.5 mol of molecular oxygen. Which compounds could be X? 1 C2H…Question 16: Use of the Data Booklet is relevant to this question. Titanium(IV) oxide, TiO2, is brilliantly white and much of the oxide produced is used…Question 17: Carbon disulphide vapour burns in oxygen according to the following equation. CS2(g) + 3O2(g) → CO2(g) + 2SO2(g) A sample of 10 cm3 of carb…5 / 66
Question 18: Use of the Data Booklet is relevant to this question. Ethyl ethanoate can be obtained from ethanoic acid and ethanol by the following react…Question 19: A household bleach contains sodium chlorate(I), NaClO, as its active ingredient. The concentration of NaClO in the bleach can be determined…Question 20: 0.200 mol of a hydrocarbon undergo complete combustion to give 35.2 g of carbon dioxide and 14.4 g of water as the only products. What is t…Question 21: During electrolysis of brine in a diaphragm cell, chlorine, hydrogen and sodium hydroxide are produced. What is the molar ratio of these pr…6 / 66
Question 22: Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, X, reacts with an excess of chlorine to form 5.287 g of …Question 23: Which mass of gas would occupy a volume of 3 dm3 at 25 °C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm3 at 25 °C and 1 atmospher…Question 24: Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, X, reacts with an excess of chlorine to form 5.287 g of …Question 25: Which mass of gas would occupy a volume of 3 dm3 at 25 °C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm3 at 25 °C and 1 atmospher…Question 26: Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, X, reacts with an excess of chlorine to form 5.287 g of …7 / 66
Question 27: Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A alumi…Question 28: In a calorimetric experiment 1.60 g of a fuel is burnt. 45 % of the energy released is absorbed by 200 g of water whose temperature rises f…Question 29: The value of the equilibrium constant, Kc, for the reaction to form ethyl ethanoate from ethanol and ethanoic acid is 4.0 at 60 °C. C2H5OH …Question 30: Ammonium sulfate in nitrogenous fertilisers in the soil can be slowly oxidised by air producing sulfuric acid, nitric acid and water. How m…Question 31: Use of the Data Booklet is relevant to this question. Which mass of solid residue can be obtained from the thermal decomposition of 4.10 g …Question 32: Use of the Data Booklet is relevant for this question. In an organic synthesis, a 62 % yield of product is achieved. Which of these convers…8 / 66
Question 33: The value of the equilibrium constant, Kc, for the reaction to form ethyl ethanoate from ethanol and ethanoic acid is 4.0 at 60 °C. C2H5OH …Question 34: Ammonium sulfate in nitrogenous fertilisers in the soil can be slowly oxidised by air producing sulfuric acid, nitric acid and water. How m…Question 35: 50 cm3 of 2.50 mol dm–3 hydrochloric acid was placed in a polystyrene beaker of negligible heat capacity. Its temperature was recorded and …Question 36: 0.02 mol of aluminium is burned in oxygen and the product is reacted with 2.00 mol dm–3 hydrochloric acid. What minimum volume of acid will…9 / 66
Question 37: Use of the Data Booklet is relevant to this question. Zinc reacts with hydrochloric acid according to the following equation. Zn + 2HCl → Z…Question 38: 0.144 g of an aluminium compound X react with an excess of water, to produce a gas. This gas burns completely in O2 to form H2O and 72 cm3 …Question 39: 50 cm3 of 2.50 mol dm–3 hydrochloric acid was placed in a polystyrene beaker of negligible heat capacity. Its temperature was recorded and …Question 40: 0.02 mol of aluminium is burned in oxygen and the product is reacted with 2.00 mol dm–3 hydrochloric acid. What minimum volume of acid will…10 / 66
Question 41: Use of the Data Booklet is relevant to this question. Zinc reacts with hydrochloric acid according to the following equation. Zn + 2HCl → Z…Question 42: Use of the Data Booklet is relevant to this question. Lead(IV) chloride will oxidise bromide ions to bromine. The Pb4+ ions are reduced to …Question 43: An aqueous solution was prepared containing 1.0 mol of AgNO3 and 1.0 mol of FeSO4 in 1.00 dm3 of water. When equilibrium was established, t…Question 44: Use of the Data Booklet is relevant to this question. A significant contribution to atmospheric carbon dioxide levels comes from the therma…11 / 66
Question 45: Use of the Data Booklet is relevant to this question. A 5.00 g sample of an anhydrous Group II metal nitrate loses 3.29 g in mass when heat…Question 46: Use of the Data Booklet is relevant to this question. 2.76 g of ethanol were mixed with an excess of aqueous acidified potassium dichromate…Question 47: The following equations the letters W, X, Y and Z all represent whole numbers. When correctly balanced, which equation requires one of lett…Question 48: Use of the Data Booklet is relevant to this question. 560 kg of nitrogen and 120 kg of hydrogen are pressurised, heated and passed over an …Question 49: Use of the Data Booklet is relevant to this question. 2.30 g of ethanol were mixed with aqueous acidified potassium dichromate(VI). The des…12 / 66
Question 50: Use of the Data Booklet is relevant to this question. A 5.00 g sample of an anhydrous Group II metal nitrate loses 3.29 g in mass when heat…Question 51: Use of the Data Booklet is relevant to this question. A significant contribution to atmospheric carbon dioxide levels comes from the therma…Question 52: Use of the Data Booklet is relevant to this question. 2.76 g of ethanol were mixed with an excess of aqueous acidified potassium dichromate…Question 53: Use of the Data Booklet is relevant to this question. The gas laws can be summarised in the ideal gas equation. pV = nRT 0.56 g of ethene g…13 / 66
Question 54: Two moles of compound P were placed in a vessel. The compound P was partly decomposed by heating. A dynamic equilibrium between chemicals P…Question 55: Use of the Data Booklet is relevant to this question. When a mineral was heated in a Bunsen flame to constant mass, a colourless gas that t…Question 56: Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the pro…Question 57: Use of the Data Booklet is relevant to this question. A sample of ethyl propanoate is hydrolysed by heating under reflux with aqueous sodiu…Question 58: A number of alcohols with the formula C4H10O are separately oxidised. Using 70 g of the alcohols a 62 % yield of organic product is achieve…14 / 66
Question 59: Use of the Data Booklet is relevant to this question. The gas laws can be summarised in the ideal gas equation. pV = nRT 0.96 g of oxygen g…Question 60: Two moles of compound P were placed in a vessel. The vessel was heated and compound P was partly decomposed to produce Q and R. A dynamic e…Question 61: Use of the Data Booklet is relevant to this question. A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodiu…Question 62: Use of the Data Booklet is relevant to this question. The gas laws can be summarised in the ideal gas equation. pV = nRT 0.56 g of ethene g…15 / 66
Question 63: Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the pro…Question 64: Use of the Data Booklet is relevant to this question. A sample of ethyl propanoate is hydrolysed by heating under reflux with aqueous sodiu…Question 65: A number of alcohols with the formula C4H10O are separately oxidised. Using 70 g of the alcohols a 62 % yield of organic product is achieve…Question 66: Use of the Data Booklet is relevant to this question. The nitrates of beryllium, calcium, magnesium, and strontium all decompose in the sam…Question 67: Use of the Data Booklet is relevant to this question. 1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressur…16 / 66
Question 68: Use of the Data Booklet is relevant to this question. The nitrates of beryllium, calcium, magnesium, and strontium all decompose in the sam…Question 69: Use of the Data Booklet is relevant to this question. 1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressur…Question 70: During steel-making the impurity P4O10 is removed by reacting it with calcium oxide. The only product of this reaction is the salt calcium …Question 71: Use of the Data Booklet is relevant to this question. When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas …17 / 66
Question 72: In the Haber process, the reaction between the two gaseous reactants requires the use of a catalyst that contains a transition element. Wha…Question 73: Use of the Data Booklet is relevant to this question. 2.30 g of ethanol were mixed with aqueous acidified potassium dichromate(VI) and the …Question 74: An element X and compound YZ react separately with acid as shown. X(s) + 2H+(aq) → X2+(aq) + H2(g) YZ(s) + 2H+(aq) → Y2+(aq) + H2Z(g) When …Question 75: A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen. After cooling to room temperature, the residual g…Question 76: A solution of Sn2+ ions will reduce an acidified solution of MnO4 – ions to Mn2+ ions. The Sn2+ ions are oxidised to Sn4+ ions in this reac…18 / 66
Question 77: Use of the Data Booklet is relevant to this question. Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a m…Question 78: Use of the Data Booklet is relevant to this question. 2.30 g of ethanol were mixed with an excess of aqueous acidified potassium dichromate…Question 79: Use of the Data Booklet is relevant to this question. A student mixed 25 cm3 of 0.10 mol dm–3 sodium hydroxide solution with 25 cm3 of 0.10…Question 80: Use of the Data Booklet is relevant to this question. Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a m…Question 81: Use of the Data Booklet is relevant to this question. Which volume of oxygen measured at room temperature and pressure is needed for comple…19 / 66
Question 82: Use of the Data Booklet is relevant to this question. When 0.15 g of an organic compound is vaporised, it occupies a volume of 65.0 cm3 at …Question 83: Use of the Data Booklet is relevant to this question. A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients…Question 84: Use of the Data Booklet is relevant to this question. Anhydrous magnesium nitrate, Mg(NO3)2 , will decompose when heated, giving a white so…Question 85: Use of the Data Booklet is relevant to this question. Which volume of oxygen, at room temperature and pressure, is needed for complete comb…Question 86: Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the pro…20 / 66
Question 87: A student mixed 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.350 mol dm–3 hydrochloric acid. The temperature ros…Question 88: Use of the Data Booklet is relevant to this question. A chemist took 2.00 dm3 of nitrogen gas, measured under room conditions, and reacted …Question 89: How many moles of oxygen molecules are needed for the complete combustion of one mole of 3-methylpent-2-ene? A 9 B 9 2 1 C 18 D 19Question 90: Use of the Data Booklet is relevant to this question. In an organic synthesis, a 62% yield of product is achieved. Which conversions are co…Question 91: Use of the Data Booklet is relevant to this question. In an experiment, 12.0 dm3 of oxygen, measured under room conditions, is used to burn…Question 92: Ammonium sulfate in the soil is slowly oxidised by air, producing sulfuric acid, nitric acid and water as the only products. How many moles…21 / 66
Question 93: Use of the Data Booklet is relevant to this question. In an experiment, 0.125 mol of chlorine gas, Cl 2, is reacted with an excess of cold …Question 94: Use of the Data Booklet is relevant to this question. In an experiment, 0.6 mol of chlorine gas, Cl 2, is reacted with an excess of hot aqu…Question 95: A student investigates four different fuels. Each fuel is used separately to raise the temperature of 1 dm3 of water from 20 °C to 100 °C. …Question 96: Aluminium carbide, Al 4C3, reacts readily with aqueous sodium hydroxide. The two products of the reaction are NaAl O2 and a hydrocarbon. Wa…Question 97: In an experiment to calculate the enthalpy change of combustion of a fuel, 1.5 g (0.0326 mol) of the fuel was used to heat 200 g of water. …22 / 66
Question 98: Use of the Data Booklet is relevant to this question. A sample of potassium oxide, K2O, is dissolved in 250 cm3 of distilled water. 25.0 cm…Question 99: Use of the Data Booklet is relevant to this question. A sample of potassium oxide, K2O, is dissolved in 250 cm3 of distilled water. 25.0 cm…Question 100: Use of the Data Booklet is relevant to this question. Ferrochrome is an alloy of iron and chromium. Ferrochrome can be dissolved in dilute …Question 101: Use of the Data Booklet is relevant to this question. When 0.47 g of a hydrocarbon was completely burnt in air, the energy released heated …Question 102: What is the ionic equation for the reaction between aqueous sodium carbonate and dilute nitric acid? A 2HNO3(aq) + CO3 2–(aq) → H2O(l) …23 / 66
Question 103: Use of the Data Booklet is relevant to this question. 1.00 g of carbon is combusted in a limited supply of pure oxygen. 0.50 g of the carbo…Question 104: The three minerals below are obtained from mines around the world. Each one behaves as a mixture of two carbonate compounds. They can be us…Question 105: Use of the Data Booklet is relevant to this question. Which mass of solid residue will be obtained from the thermal decomposition of 4.10 g…24 / 66
Question 106: The citrus flavour of lemons is due to the compound limonene, present in both the peel and the juice. limonene What is the mole ratio of ca…Question 107: The shell of a chicken’s egg makes up 5% of the mass of an average egg. An average egg has a mass of 50 g. Assume the egg shell is pure cal…Question 108: Use of the Data Booklet is relevant to this question. When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas …Question 109: Use of the Data Booklet is relevant to this question. 2.40 g of propan-2-ol were mixed with excess acidified potassium dichromate(VI). The …25 / 66
Question 110: Citric acid is found in lemon juice. HO2CCH2C(OH)(CO2H)CH2CO2H citric acid What is the volume of 0.4 mol dm–3 sodium hydroxide solution req…Question 111: Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the pro…Question 112: Use of the Data Booklet is relevant to this question. Brine is concentrated aqueous sodium chloride. In the commercial electrolysis of brin…Question 113: Use of the Data Booklet is relevant to this question. 4.70 g of an ammonium salt is heated with excess aqueous sodium hydroxide. The volume…Question 114: What is the volume of steam produced when 1.00 g of ice is heated to 323 °C at a pressure of 101 kPa? A 0.27 dm3 B 1.3 dm3 C 2.7 dm3 D 48 d…26 / 66
Question 115: In an experiment, 2.00 mol of hydrogen and 3.00 mol of iodine were heated together in a sealed container and allowed to reach equilibrium a…Question 116: A white powder is known to be a mixture of magnesium oxide and aluminium oxide. 100 cm3 of 2 mol dm–3 NaOH(aq) is just sufficient to cause …Question 117: A piece of rock has a mass of 2.00 g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0 cm3 of 0.50…Question 118: When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are formed. NH4Cl…27 / 66
Question 119: A 0.005 mol sample of anhydrous calcium carbonate was completely thermally decomposed to give 100 cm3 of gas measured at a certain temperat…Question 120: An excess of chlorine gas, Cl 2, is passed through 60 cm3 of cold aqueous 0.1 mol dm–3 sodium hydroxide. In a separate experiment an excess…Question 121: In an experiment, 10 cm3 of an organic compound, J, in the gaseous state was sparked with an excess of oxygen. 20 cm3 of carbon dioxide and…Question 122: Anhydrous magnesium nitrate, Mg(NO3)2 , will decompose when heated, giving a white solid and a mixture of two gases X and Y. Y is oxygen. m…Question 123: Which volume of oxygen, at room temperature and pressure, is needed for complete combustion of 1.0 mol of methylpropan-1-ol? A 108 dm3 B 14…Question 124: An important reaction in the manufacture of nitric acid is the catalytic oxidation of ammonia. 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) For ev…28 / 66
Question 125: 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, at 298 K and 1 atm pressure, to form an oxide which contains O2…Question 126: Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a mixture of gases. One of the gases released is an oxide…Question 127: An important reaction in the manufacture of nitric acid is the catalytic oxidation of ammonia. 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) For ev…Question 128: 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, at 298 K and 1 atm pressure, to form an oxide which contains O2…Question 129: Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a mixture of gases. One of the gases released is an oxide…29 / 66
Question 130: In some fireworks there is a reaction between powdered aluminium and powdered barium nitrate. Heat is evolved, an unreactive gas is produce…Question 131: A chemist took 2.00 dm3 of nitrogen gas, measured under room conditions, and reacted it with a large volume of hydrogen gas to produce ammo…Question 132: A 0.216 g sample of an aluminium compound X reacts with an excess of water to produce a single hydrocarbon gas. This gas burns completely i…Question 133: Which equation correctly describes the complete combustion of an alkene, CnH2n? A CnH2n + 2 3 nO2 → nCO2 + 2nH2O B CnH2n + 2 3 nO2 …Question 134: What would be produced when 60 g of nitrogen monoxide react with an excess of carbon monoxide in a catalytic converter? A 12 g of carbon an…Question 135: A student makes sodium chloride by reacting together 0.025 mol of sodium carbonate with an excess of 0.2 mol dm–3 hydrochloric acid. Na2CO3…30 / 66
Question 136: The airbags in cars contain sodium azide, NaN3, and an excess of potassium nitrate, KNO3. In a car accident, the reactions shown occur, pro…Question 137: Exactly 3.705 kg of substance Y are needed to neutralise 100 moles of HCl (aq). What could be substance Y? A Ca B CaO C Ca(OH)2 D CaCO3Question 138: In an experiment, 0.125 mol of chlorine gas, Cl 2, is reacted with an excess of cold, aqueous sodium hydroxide. One of the products is a co…Question 139: A student makes sodium chloride by reacting together 0.025 mol of sodium carbonate with an excess of 0.2 mol dm–3 hydrochloric acid. Na2CO3…Question 140: Which mass of solid residue is obtained from the thermal decomposition of 4.10 g of anhydrous calcium nitrate? A 0.70 g B 1.00 g C 1.40 g D…Question 141: Sodium hydroxide neutralises acid. H+ + OH– → H2O In a 11 000 dm3 sample of an aqueous solution, the concentration of acid, [H+], is 1.…Question 142: Which volume of hydrogen, measured under room conditions, is produced when 0.160 g of methanol reacts with an excess of sodium? A 60 cm3 B …31 / 66
Question 143: Which fuel would produce the largest mass of CO2 when 10 kg of the fuel undergo complete combustion? A biodiesel, C17H34O2 B ethanol, C2H6O…Question 144: When 3.00 g of an anhydrous nitrate of a Group 2 metal is decomposed, 1.53 g of gas is produced. What is the nitrate compound? A beryllium …Question 145: To manufacture cement, 1000 million tonnes of limestone are decomposed each year. To manufacture lime for agriculture, 200 million tonnes o…Question 146: Three samples of chlorine gas each contain 0.710 g of chlorine. Each sample is reacted with a reagent. ● In the first reaction a sample is …Question 147: Aspirin, C9H8O4, Mr = 180.0, can be made by a reaction between 2-hydroxybenzoic acid, C7H6O3, Mr = 138.0, and ethanoic anhydride, C4H6O3, M…32 / 66
Question 148: When 0.0075 mol of alcohol X are completely burnt in excess oxygen and the gases produced are passed through an excess of limewater (calciu…Question 149: A sample of the hydrocarbon C6H12 is completely burned in dry oxygen and the product gases are collected as shown. product gases, H2O + CO2…Question 150: In this question you should assume methane behaves as an ideal gas. The gas laws can be summarised in the ideal gas equation below. pV = nR…33 / 66
Question 151: A butane burner is used to heat water. The Mr of butane is 58. ● of butane is –2877 kJ mol–1. ● 250 g of water is heated from 12 °C to 100 …Question 152: 0.200 mol of sulfur dioxide and 0.200 mol of oxygen are placed in a 1.00 dm3 sealed container. The gases are allowed to react until equilib…Question 153: An organic molecule W contains 3 carbon atoms. It requires 4.5 molecules of oxygen for complete combustion. What could W be? A propane B pr…Question 154: Exactly 1.00 g of a metallic element reacts completely with 300 cm3 of oxygen at 298 K and 1 atm pressure to form an oxide which contains O…34 / 66
Question 155: A 4.00 g sample of an anhydrous Group 2 metal nitrate is heated strongly until there is no further change. A solid residue of mass 1.37 g i…Question 156: Zinc reacts with hydrochloric acid according to the following equation. Zn + 2HCl → ZnCl 2 + H2 Which statements are correct? 1 A 3.2…Question 157: A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W. In order to precipitate all of the aluminium as its hydroxi…35 / 66
Question 158: A sample of the hydrocarbon C6H12 is completely burned in dry oxygen and the product gases are collected as shown. product gases, H2O + CO2…Question 159: 5.0 g samples of the carbonates of barium, copper, lithium and magnesium are decomposed to the metal oxides and carbon dioxide. For which c…Question 160: A butane burner is used to heat water. The Mr of butane is 58. ● of butane is –2877 kJ mol–1. ● 250 g of water is heated from 12 °C to 100 …36 / 66
Question 161: 0.200 mol of sulfur dioxide and 0.200 mol of oxygen are placed in a 1.00 dm3 sealed container. The gases are allowed to react until equilib…Question 162: An organic molecule W contains 3 carbon atoms. It requires 4.5 molecules of oxygen for complete combustion. What could W be? A propane B pr…Question 163: A 3.7 g sample of copper(II) carbonate is added to 25 cm3 of 2.0 mol dm–3 hydrochloric acid. Which volume of gas is produced under room con…Question 164: Acidified potassium manganate(VII) reacts with iron(II) ethanedioate, FeC2O4. The reactions taking place are shown. MnO4 – + 8H+ + 5e– …Question 165: When calcium nitrate thermally decomposes, oxygen is one of the products. Which volume of oxygen is produced under room conditions when 0.5…37 / 66
Question 166: In an experiment, 10 cm3 of an organic compound, J, in the gaseous state is reacted with an excess of oxygen. Steam, 20 cm3 of carbon dioxi…Question 167: A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients. In a titration, a solution containing 1.00 g of this…Question 168: When an evacuated tube of volume 400 cm3 is filled with gas at 300 K and 101 kPa, the mass of the tube increases by 0.65 g. Assume the gas …Question 169: Ethanedioic acid, HO2CCO2H, can be oxidised by KMnO4 in dilute sulfuric acid. The products of this reaction are carbon dioxide, water, pota…Question 170: 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, under room conditions, to form an oxide which contains O2– ions…38 / 66
Question 171: The reaction of bromine with warm NaOH(aq) produces products with the same oxidation numbers, in the same ratios, as the reaction of chlori…Question 172: X, Y and Z are all gases that behave ideally and react according to the equation shown. X(g) + 2Y(g) → 2Z(g) When 3.0 mol of X and 3.0 …Question 173: Ethyl ethanoate undergoes the following reaction. CH3CO2C2H5 + H2O C2H5OH + CH3CO2H Kc = 0.27 Equal amounts of ethanoic acid and ethano…Question 174: An excess of chlorine was bubbled into 100 cm3 of hot 6.0 mol dm–3 sodium hydroxide. How many moles of sodium chloride would be produced in…Question 175: In an organic synthesis, a 62% yield of product is achieved. Which conversions are consistent with this information? 1 74.00 g of butan-2-o…39 / 66
Question 176: The volume of carbon dioxide collected by reacting 0.100 mol of magnesium carbonate with 50.0 cm3 of 1.00 mol dm–3 sulfuric acid is measure…Question 177: An aqueous solution of a calcium compound is treated with a mixture of dilute aqueous nitric acid and aqueous silver nitrate. The resulting…Question 178: In a catalytic converter 5.6 g of carbon monoxide reacts with an excess of nitrogen monoxide. What is produced in this reaction? A 2.4 g of…Question 179: A 5.00 g sample of an anhydrous Group 2 metal nitrate loses 3.29 g in mass when heated strongly. Which metal is present? A magnesium B calc…40 / 66
Question 180: In this question it should be assumed that (NH4)2CO3.H2O(s) dissolves in water without causing an increase in volume. Which mass of (NH4)2C…Question 181: What is the smallest amount of oxygen molecules needed for the complete combustion of 40.0 g of methanol? A 1.88 moles B 2.50 moles C 3.75 …Question 182: A 5.00 g sample of an anhydrous Group 2 metal nitrate loses 3.29 g in mass when heated strongly. Which metal is present? A magnesium B calc…Question 183: Sodium azide, NaN3, decomposes as shown. 2NaN3 → 2Na + 3N2 Which volume of nitrogen, measured at room temperature and pressure, will be…Question 184: 10 cm3 of ethane is burned in 45 cm3 of oxygen at a pressure of 101 kPa and a temperature of 200 °C. Complete combustion takes place. What …Question 185: 6.90 g of an ammonium salt is heated with an excess of aqueous sodium hydroxide. The volume of ammonia produced, measured under room condit…Question 186: 0.25 g of anhydrous magnesium nitrate is heated strongly until it completely decomposes. What is the total volume of gas produced, measured…41 / 66
Question 187: A copper ore contains 3.00% of copper carbonate, CuCO3, by mass. Which mass of copper would be obtained from 1 tonne of the ore? A 1.91 kg …Question 188: In this question you should assume air contains 21% oxygen. What is the minimum volume of air required to ensure complete combustion of 10 …Question 189: Magnesium nitrate, Mg(NO3)2, decomposes when heated to give a white solid and a mixture of gases. One of the gases released is an oxide of …Question 190: The ester ethyl methanoate is prepared in a school laboratory by reacting a carboxylic acid with an alcohol. During the reaction, only 50.0…Question 191: Which contain one mole of the underlined substance under room conditions? 1 a balloon containing 24.0 dm3 of helium 2 a block of calcium ca…Question 192: On complete combustion, a sample of X produces 44 g of carbon dioxide and 27 g of water. On complete combustion, a sample of Y produces 44 …Question 193: Strontium metal can be extracted from strontium oxide, SrO, by reduction with aluminium. One of the possible reactions is shown. 6SrO + 2…42 / 66
Question 194: In aqueous solution, sulfuric acid dissociates as shown. H2SO4  HSO4 – + H+ This reaction goes to completion. HSO4 – SO4 2– + H+ Thi…Question 195: The units of Kc for an equilibrium reaction are mol–1 dm3. What could be the equation for the equilibrium? 1 A(aq) + B(aq) C(s) + D(aq)…Question 196: An ore of manganese contains 4% by mass of MnO2 and no other manganese compound. Which mass of manganese would be obtained from 1 tonne of …Question 197: A white powder is known to be a mixture of magnesium oxide and aluminium oxide. 100 cm3 of 2 mol dm–3 NaOH(aq) is just enough to dissolve t…43 / 66
Question 198: Compound X is the oxide of a Period 3 element. Compound X reacts with water to give an acidic solution. A solution is prepared by reacting …Question 199: Strontium metal can be extracted from strontium oxide, SrO, by reduction with aluminium. One of the possible reactions is shown. 6SrO + 2…Question 200: A solution contains 0.25 g of sulfur dioxide in 1.00 dm3 of water. Which volume of sulfur dioxide, measured at 50 C and a pressure of 1  …Question 201: A large excess of marble chips is reacted with 25 cm3 of 1.0 mol dm–3 hydrochloric acid at 40 C. How is the result different when the reac…Question 202: What is the minimum mass of oxygen required to ensure the complete combustion of 12 dm3 of propane measured under room conditions? A 60 g B…Question 203: A sample of propane, C3H8, with a mass of 9.61 g is completely combusted in an excess of oxygen under room conditions. Which volume of carb…Question 204: Copper dissolves in dilute nitric acid producing a blue solution of Cu(NO3)2, water and nitrogen(II) oxide as the only products. How many m…44 / 66
Question 205: A mixture of ethanol and methanol is burned in oxygen to produce 35 cm3 of CO2 and 55 cm3 of H2O. Complete combustion occurs and the volume…Question 206: 2.0 g of ammonium nitrate, NH4NO3, decomposes to give 0.90 g of water and a single gas. What is the identity of the gas? A NO B NO2 C N2O D…Question 207: Anhydrous magnesium nitrate, Mg(NO3)2, decomposes when heated, giving a white solid and a mixture of two gases, X and Y. Y is oxygen. What …Question 208: Citric acid is found in lemon juice. citric acid HO2CCH2C(OH)(CO2H)CH2CO2H Which volume of 0.40 mol dm–3 sodium hydroxide solution is requi…Question 209: A 0.005 mol sample of anhydrous calcium carbonate is completely thermally decomposed to give 100 cm3 of gas. In a separate experiment carri…Question 210: 2.0 g of ammonium nitrate, NH4NO3, decomposes to give 0.90 g of water and a single gas. What is the identity of the gas? A NO B NO2 C N2O D…45 / 66
Question 211: Which element requires the least number of moles of oxygen for the complete combustion of 1 mol of its atoms? A aluminium B magnesium C pho…Question 212: Anhydrous magnesium nitrate, Mg(NO3)2, decomposes when heated, giving a white solid and a mixture of two gases, X and Y. Y is oxygen. What …Question 213: Citric acid is found in lemon juice. citric acid HO2CCH2C(OH)(CO2H)CH2CO2H Which volume of 0.40 mol dm–3 sodium hydroxide solution is requi…Question 214: ‘Black powder’ is a mixture of potassium nitrate, carbon and sulfur. The mixture reacts as shown. 4KNO3(s) + 7C(s) + S(s)  3CO2(g) …Question 215: A student reacts 4 mol of ammonia with oxygen to produce an oxide of nitrogen and water only. Each nitrogen atom increases its oxidation st…Question 216: A 3.0 g sample of Na2CO3 powder is stirred into 50 cm3 of 1.0 mol dm–3 HCl. The volume of CO2 produced is 600 cm3. Na2CO3(s) + 2HCl (aq) …46 / 66
Question 217: A student reacts 0.100 mol of each of sodium, magnesium and phosphorus atoms separately with an excess of oxygen. Which rows are correct? m…Question 218: In a catalytic converter, 5.6 g of carbon monoxide react with an excess of nitrogen monoxide. What is produced in this reaction? A 2.4 g of…Question 219: 17.6 g of pentan-1-ol is completely combusted. Which volume of gaseous products is formed when measured at s.t.p.? A 22.4 dm3 B 24.0 dm3 C …Question 220: Hydrogen and iodine can react reversibly to produce hydrogen iodide. The equation is shown. H2(g) + I2(g) 2HI(g) 4.00 mol of hydrogen gas…47 / 66
Question 221: Ethyl butanoate is a flavouring, with a fruity flavour. Which row is correct? alcohol and acid that react the mass of water formed to form …Question 222: How many moles of oxygen, O2, are needed to burn 1 mol of ethane if the products of the reaction are water and carbon only? A 1.5 B 3 C 3.5…Question 223: A student reacts 1 mol of magnesium powder in a sealed 0.030 m3 container of oxygen at a pressure of 2.0  105 Pa and a temperature of 600 …Question 224: A student adds 3 mol of acidified K2Cr2O7 to an excess of I– ions. The chromium is all reduced to Cr3+ and I– ions are oxidised to I2. The …48 / 66
Question 225: The reaction between sulfur dioxide and oxygen is reversible. 2SO2(g) + O2(g) 2SO3(g) Kc = 280 mol–1 dm3 at 1000 K In an equilibrium mixt…Question 226: A 4.00 g sample of an anhydrous Group 2 metal nitrate, Z, is heated strongly until there is no further change of mass. A solid residue of m…Question 227: Mixture R consists of one mole of C3H6 and one mole of C4H6. What is the minimum number of moles of oxygen molecules needed for complete co…Question 228: The carbonate of an s-block element is reacted with an excess of hydrochloric acid. 0.833 g of the carbonate releases 200 cm3 of gas, measu…Question 229: A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.350 mol dm–3 hydrochloric acid. The temperature inc…49 / 66
Question 230: Ethanol is produced industrially by reacting ethene and steam. C2H4(g) + H2O(g) C2H5OH(g) Kp has a value of 1.8 × 10–5 and the partial pr…Question 231: Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the reaction is complete. 6NaOH(aq) + xCl 2(aq) → yNaCl …Question 232: Sodium peroxide, Na2O2, is used to absorb carbon dioxide from the atmosphere and release oxygen in closed environments such as space capsul…50 / 66
Question 233: Calcium oxide and magnesium sulfide each react with acid. CaO(s) + 2H+(aq)  Ca2+(aq) + H2O(l) MgS(s) + 2H+(aq)  Mg2+(aq) + H2…Question 234: The nitrates of beryllium, calcium, magnesium and strontium all decompose in the same way when heated. When 2.00 g of one of these anhydrou…Question 235: Mixture R consists of one mole of C3H6 and one mole of C4H6. What is the minimum number of moles of oxygen molecules needed for complete co…Question 236: The carbonate of an s-block element is reacted with an excess of hydrochloric acid. 0.833 g of the carbonate releases 200 cm3 of gas, measu…Question 237: A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.350 mol dm–3 hydrochloric acid. The temperature inc…51 / 66
Question 238: Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the reaction is complete. 6NaOH(aq) + xCl 2(aq)  yNaCl …Question 239: A sample containing 0.010mol of anhydrous calcium nitrate is heated strongly until it fully decomposes. All the gas produced is collected a…Question 240: An aqueous solution contains 4.00g of a carboxylic acid, Q. When this solution reacts with an excess of magnesium, 380cm3 of gas is produce…Question 241: A piece of rock has a mass of 2.00g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0cm3 of 0.500m…Question 242: This amount of oxygen gas has a volume of 6.00cm3 when measured at 1.00 × 105Pa and 35°C. What is the concentration of oxygen gas in the wa…52 / 66
Question 243: Which mixture will react to form exactly one mole of water? volume 2.00moldm–3 volume 1.00moldm–3 H2SO4/cm3 NaOH/cm3 A 250 500 B 250 1000 C…Question 244: The enthalpy change for neutralisation of HNO3(aq) with NaOH(aq) is –57.0kJmol–1. In an experiment, 20.0cm3 of 4.00moldm–3 HNO3 is mixed wi…Question 245: A sample of 35.6g of hydrated sodium carbonate contains 25.84% sodium ions by mass. When this sample is heated, anhydrous sodium carbonate …Question 246: When an equimolar mixture of H2 and I2 react, the mole fraction of HI in the final mixture is x. What is the equilibrium constant, Kp, for …53 / 66
Question 247: In reaction 1, a student measures the initial rate of production of CO2(g) when CuCO3(s) is added to 50cm3 of 0.1moldm−3 HNO3(aq). In react…Question 248: A 5.00g sample of an anhydrous Group 2 metal nitrate loses 3.29g in mass when heated strongly. Which metal is present? A magnesium B calciu…Question 249: Zinc reacts with concentrated nitric acid giving three products only: zinc nitrate, an oxide of nitrogen and water. 3.0 moles of zinc react…Question 250: Which volume of gas is produced at room conditions? A 0.60dm3 B 0.72dm3 C 1.20dm3 D 2.40dm3Question 251: room conditions. What is the final volume of gas, measured at room conditions? A 7.20dm3 B 8.40dm3 C 16.80dm3 D 18.00dm354 / 66
Question 252: A mixture of the three gases, oxygen, nitrogen and argon, is at a total pressure of 500kPa. There is a total of 1.2 moles of gas in the mix…Question 253: gases are allowed to react until equilibrium is reached. 2SO2 + O2 ⇋2SO3 At equilibrium there is 0.100mol of SO3 in the container. What is …Question 254: A sample of 35.6g of hydrated sodium carbonate contains 25.84% sodium ions by mass. When this sample is heated, anhydrous sodium carbonate …Question 255: A 5.00g sample of an anhydrous Group 2 metal nitrate loses 3.29g in mass when heated strongly. Which metal is present? A magnesium B calciu…55 / 66
Question 256: What is the maximum volume of sulfur dioxide gas measured at room conditions produced from burning 100 dm3 of diesel fuel containing 0.8346…Question 257: KMnO4 is an oxidising agent. Its reaction with Fe2+ is shown in the following ionic equation. ...X...MnO4 – + ......Fe2+ + ......H+  …Question 258: How many moles of oxygen gas are needed for the complete combustion of 1 mol of (CH3)3COH? A 6 B 6.5 C 12 D 13Question 259: Sample X is added to water and made up to a total volume of 200 cm3. This gives a solution of 0.100 mol dm–3 HCl. What is X? A 10 cm3 of 1.…Question 260: A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen. After cooling, the residual gas was passed throug…Question 261: Oxygen can be prepared by the reaction of potassium manganate(VII), KMnO4, hydrogen peroxide, H2O2, and sulfuric acid, H2SO4. Each H2O2 mol…Question 262: What is the total volume of gas produced, measured at room conditions, when 0.010 mol of anhydrous magnesium nitrate is completely decompos…56 / 66
Question 263: The molecule of limonene, C10H16, contains a 6-membered ring. This is the only cyclic component in its structure. Which volume of hydrogen,…Question 264: X is an impure sample of a Group 2 metal carbonate, MCO3. X contains 57% by mass of MCO3. The impurities in X do not react with hydrochlori…Question 265: The apparatus used to determine a value for the enthalpy of combustion of butan-1-ol is shown. The mass of 1.00 cm3 of water is 1.00 g. the…57 / 66
Question 266: W moles of HNO2 undergoes a disproportionation reaction to produce U moles of HNO3 and V moles of NO. ● No other nitrogen containing produc…Question 267: Gas X dissociates on heating to set up the following equilibrium. X(g) Y(g) + Z(g) A quantity of gas X is heated at constant pressure, p,…Question 268: A sample consisting of 1.0 mol of anhydrous calcium nitrate is completely decomposed by strong heating. What is the total amount of gas pro…Question 269: What is produced when 60 g of nitrogen monoxide reacts with an excess of carbon monoxide in a catalytic converter? A 12 g of carbon and 92 …Question 270: A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous NaOH. The two organic products of the hydrolysis are separa…58 / 66
Question 271: Compound X has the following properties. ● When 0.20 mol of X undergoes complete combustion, 14.4 dm3 of carbon dioxide is produced, measur…Question 272: When 0.20 mol of hydrogen gas and 0.15 mol of iodine gas are heated at 723 K until equilibrium is established, the equilibrium mixture cont…Question 273: 7.5 g of nitrogen monoxide reacts with 7.0 g of carbon monoxide on the surface of the catalytic converter in the exhaust system of a car. W…Question 274: The structure of limonene is shown. limonene What are the number of moles of carbon dioxide and water produced when a sample of limonene is…59 / 66
Question 275: A 0.216 g sample of aluminium carbide reacts with an excess of water to produce methane gas. This is the only carbon-containing product for…Question 276: A sample of propanoic acid of mass 3.70 g reacts with an excess of magnesium. A second sample of propanoic acid of mass 3.70 g reacts with …Question 277: 7.5 g of nitrogen monoxide reacts with 7.0 g of carbon monoxide on the surface of the catalytic converter in the exhaust system of a car. W…Question 278: The structure of limonene is shown. limonene What are the number of moles of carbon dioxide and water produced when a sample of limonene is…60 / 66
Question 279: Crystals of copper(II) nitrate are prepared by adding an excess of malachite to nitric acid. The formula of malachite is Cu(OH)2•CuCO3. (Mr…Question 280: An excess of zinc reacts with x cm3 of 2.00 mol dm–3 hydrochloric acid. The gas produced is dried and collected. The gas occupies 1.534 dm3…Question 281: A student mixes 25.0 cm3 of 0.100 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.100 mol dm–3 hydrochloric acid and the student reco…Question 282: Two nitrates decompose on heating according to the equations shown. 2Pb(NO3)2(s)  2PbO(s) + 4NO2(g) + O2(g) 2NH4NO3(s)  2N2(g) +…61 / 66
Question 283: 50cm3 of 1.0moldm–3 H2SO4 is added to 100cm3 of 1.0moldm–3 NaOH in an insulated vessel. Both solutions are at a temperature of 20°C before …Question 284: Barium dithionate, BaS2O6•2H2O, is soluble in water. S2O6 2– ions slowly decompose in acidic solution. S2O6 2–(aq)  SO2(g) + SO4 2–(aq…Question 285: Two reactions are described. 1 2-bromo-2-methylbutane heated with NaOH(aq) 2 2-chloro-2-methylbutane heated with NaOH(aq) In both reactions…62 / 66
Question 286: Hydrogen peroxide, H2O2, decomposes into water and oxygen when a suitable catalyst is added. 20.0cm3 of aqueous hydrogen peroxide decompose…Question 287: A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients. In a titration, a solution containing 1.00g of this …Question 288: 0.200mol ethanenitrile reacts with an excess of dilute sodium hydroxide. The reaction produces organic compound S and ammonia gas only. The…Question 289: A 69.0 g sample of nitrogen dioxide is placed in a reaction vessel. The initial pressure of the nitrogen dioxide is P. An effective catalys…63 / 66
Question 290: When K2MnO4 reacts with concentrated hydrochloric acid, the products include chlorine molecules and MnCl 2. All of the manganese atoms are …Question 291: A nitrogen–hydrogen mixture, initially in the mole ratio of 1 : 3, reaches equilibrium with ammonia when 50% of the nitrogen has reacted. T…Question 292: When 0.010 mol of a hydrocarbon X reacts with 720 cm3 of hydrogen at room conditions, an alkane is formed. What is hydrocarbon X? A B C DQuestion 293: The juice of one lemon reacts completely with 120 cm3 of 0.50 mol dm–3 sodium carbonate solution. The formula of citric acid is HOOCCH2C(OH…64 / 66
Question 294: Methane and steam react to produce hydrogen. CH4(g) + 2H2O(g)  CO2(g) + 4H2(g) 0.80g of methane and 1.35g of steam react. One of the…Question 295: The reaction of hydrogen sulfide with sulfur dioxide gives sulfur as one of the products. The two relevant redox equations are shown. H2S(a…Question 296: In an experiment, 0.600 mol of chlorine gas, Cl 2, is reacted with an excess of hot aqueous sodium hydroxide. One of the products is NaCl O…Question 297: In four separate reactions, W, X, Y and Z, 1 mol of an organic compound reacts with an excess of a reagent. organic compound reagent W (CH2…65 / 66
Question 298: Butylamine can be produced by the reaction of butanenitrile with hydrogen in the presence of a suitable catalyst. Which volume of hydrogen,…Question 299: Methane and steam react to produce hydrogen. CH4(g) + 2H2O(g)  CO2(g) + 4H2(g) 0.80g of methane and 1.35g of steam react. One of the…Question 300: Equal masses of CaCO3, Ca(NO3)2, BaCO3 and Ba(NO3)2 are thermally decomposed. The volume of gas produced in each experiment is measured und…66 / 66

Mark scheme300 answers

Answers below. Sit the paper first if you are practising.

Pastlit

Chemistry 9701 · Reacting masses and volumes (of solutions and gases) — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

1C1
2C1
3D1
4C1
5A1
6D1
7B1
8B1
9A1
10D1
11D1
12A1
13C1
14B1
15C1
16A1
17C1
18C1
19D1
20D1
21B1
22D1
23C1
24D1
25C1
26D1
27D1
28B1
29B1
30D1
31C1
32A1
33B1
34D1
35C1
36C1
37D1
38C1
39C1
40C1
41D1
42C1
43D1
44B1
45B1
46C1
47—1
48—1
49—1
1 / 7

Pastlit

Chemistry 9701 · Reacting masses and volumes (of solutions and gases) — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

50B1
51B1
52C1
53B1
54B1
55C1
56B1
57A1
58A1
59C1
60D1
61C1
62B1
63B1
64A1
65A1
66B1
67D1
68B1
69D1
70D1
71D1
72B1
73A1
74B1
75C1
76B1
77D1
78C1
79A1
80A1
81A1
82D1
83C1
84A1
85A1
86C1
87B1
88B1
89A1
90A1
91B1
92D1
93A1
94A1
95B1
96A1
97B1
98B1
2 / 7

Pastlit

Chemistry 9701 · Reacting masses and volumes (of solutions and gases) — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

99B1
100D1
101C1
102B1
103A1
104D1
105C1
106B1
107B1
108D1
109A1
110C1
111—1
112—1
113—1
114C1
115C1
116D1
117B1
118C1
119D1
120A1
121C1
122A1
123B1
124C1
125D1
126D1
127C1
128D1
129D1
130C1
131B1
132D1
133B1
134C1
135B1
136B1
137C1
138A1
139B1
140C1
141D1
142A1
143C1
144D1
145B1
146A1
147C1
3 / 7

Pastlit

Chemistry 9701 · Reacting masses and volumes (of solutions and gases) — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

148A1
149A1
150C1
151C1
152D1
153D1
154A1
155B1
156D1
157D1
158A1
159C1
160C1
161D1
162D1
163A1
164B1
165A1
166C1
167C1
168A1
169B1
170D1
171D1
172C1
173C1
174B1
175A1
176D1
177C1
178D1
179B1
180A1
181A1
182B1
183B1
184D1
185D1
186C1
187C1
188D1
189D1
190C1
191A1
192D1
193B1
194C1
195A1
196A1
4 / 7

Pastlit

Chemistry 9701 · Reacting masses and volumes (of solutions and gases) — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

197D1
198D1
199B1
200D1
201C1
202B1
203D1
204D1
205D1
206C1
207A1
208C1
209D1
210C1
211D1
212A1
213C1
214A1
215B1
216C1
217A1
218D1
219A1
220C1
221A1
222A1
223C1
224D1
225D1
226B1
227C1
228D1
229B1
230A1
231B1
232C1
233B1
234B1
235C1
236D1
237B1
238B1
239B1
240B1
241B1
242B1
243B1
244A1
245C1
5 / 7

Pastlit

Chemistry 9701 · Reacting masses and volumes (of solutions and gases) — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

246C1
247D1
248B1
249B1
250A1
251B1
252C1
253D1
254C1
255B1
256D1
257C1
258A1
259C1
260C1
261B1
262C1
263C1
264A1
265C1
266B1
267B1
268C1
269C1
270C1
271B1
272C1
273C1
274B1
275D1
276A1
277C1
278B1
279D1
280C1
281A1
282A1
283B1
284C1
285C1
286B1
287C1
288B1
289B1
290A1
291C1
292C1
293B1
294B1
6 / 7

Pastlit

Chemistry 9701 · Reacting masses and volumes (of solutions and gases) — Paper 1

A Level · topical answer key — answer key (teacher use)

Question

Answer

Marks

295B1
296A1
297C1
298D1
299B1
300B1
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Questions as text

Q1 · The petrol additive tetraethyl-lead(IV), Pb(C2H5)4, is now banned in many countries 9701/11 Oct/Nov 2005

1 The petrol additive tetraethyl-lead(IV), Pb(C2H5)4, is now banned in many countries. When it is completely burned in air, lead(II) oxide, CO2 and H2O are formed. How many moles of oxygen are required to burn one mole of Pb(C2H5)4? A 9.5 B 11 C 13.5 D 27

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2005

Q2 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2005

15 Use of the Data Booklet is relevant to this question. What volume of oxygen, measured under room conditions, can be obtained from the thermal decomposition of 8.2 g of calcium nitrate (Mr = 164)? A 150 cm3 B 300 cm3 C 600 cm3 D 1200 cm3

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2005

Q3 · N2O4 is a poisonous gas 9701/11 May/June 2006

1 N2O4 is a poisonous gas. It can be disposed of safely by reaction with sodium hydroxide. N2O4(g) + 2NaOH(aq) → NaNO3(aq) + NaNO2(aq) + H2O(l) What is the minimum volume of 0.5 mol dm–3 NaOH(aq) needed to dispose of 0.02 mol of N2O4? A 8 cm3 B 12.5 cm3 C 40 cm3 D 80 cm3

1 marks

Answer: D

This question in 9701/11 May/June 2006

Q4 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2006

16 Use of the Data Booklet is relevant to this question. What mass of solid residue can be obtained from the thermal decomposition of 4.10 g of anhydrous calcium nitrate? A 0.70 g B 1.00 g C 1.40 g D 2.25 g

1 marks

Answer: C

This question in 9701/11 May/June 2006

Q5 · The amount of calcium ions in a sample of natural water can be determined by using an… 9701/11 Oct/Nov 2006

1 The amount of calcium ions in a sample of natural water can be determined by using an ion- exchange column as shown in the diagram. water sample ion-exchange resin A 50 cm3 sample of water containing dissolved calcium sulphate was passed through the ion- exchange resin. Each calcium ion in the sample was exchanged for two hydrogen ions. The resulting acidic solution collected in the flask required 25 cm3 of 1.0 × 10–2 mol dm–3 potassium hydroxide for complete neutralisation. What was the concentration of the calcium sulphate in the original sample? A 2.5 × 10–3 mol dm–3 B 1.0 × 10–2 mol dm–3 C 2.0 × 10–2 mol dm–3 D 4.0 × 10–2 mol dm–3

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2006

Q6 · Samples of 10 cm3 of each of the first four members of the alkane series are separately… 9701/11 Oct/Nov 2006

4 Samples of 10 cm3 of each of the first four members of the alkane series are separately mixed with 70 cm3 of oxygen. Each is then burned and the total volume, V, of residual gas measured again at room temperature and pressure. Which graph represents the results that would be obtained? A B V / cm3 V / cm3 X 80 80 X 60 60 X 40 X 40 X X 20 X 20 X 0 0 CH4 C3H8 CH4 C3H8 C2H6 C4H10 C2H6 C4H10 C D V / cm3 V / cm3 80 80 60 60 X X X X X 40 X 40 X 20 X 20 0 0 CH4 C3H8 CH4 C3H8 C2H6 C4H10 C2H6 C4H10

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2006

Q7 · The equilibrium constant, Kc, for the reaction to form ethyl ethanoate from ethanol and… 9701/11 Oct/Nov 2006

11 The equilibrium constant, Kc, for the reaction to form ethyl ethanoate from ethanol and ethanoic acid, C2H5OH + CH3CO2H CH3CO2C2H5 + H2O, at 60 oC is 4.00. When 1.00 mol each of ethanol and ethanoic acid are allowed to reach equilibrium at 60 oC, what is the number of moles of ethyl ethanoate formed? A 1 B 2 C 1 D 3 3 3 4 4

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2006

Q8 · A 5.00 g sample of an anhydrous Group II metal nitrate loses 3.29 g in mass on strong… 9701/11 Oct/Nov 2006

14 A 5.00 g sample of an anhydrous Group II metal nitrate loses 3.29 g in mass on strong heating. Which metal is present? A magnesium B calcium C strontium D barium

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2006

Q9 · The first stage in the manufacture of nitric acid is the oxidation of ammonia by oxygen 9701/11 Oct/Nov 2007

3 The first stage in the manufacture of nitric acid is the oxidation of ammonia by oxygen. wNH3(g) + xO2(g) → yNO(g) + zH2O(g) Which values for w, x, y and z are needed to balance the equation? w x y z A 4 5 4 6 B 4 6 4 5 C 5 6 5 4 D 6 5 6 4

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2007

Q10 · Nitrogen dioxide decomposes on heating according to the following equation 9701/11 Oct/Nov 2007

10 Nitrogen dioxide decomposes on heating according to the following equation. 2NO2(g) 2NO(g) + O2(g) When 4 mol of nitrogen dioxide were put into a 1 dm3 container and heated to a constant temperature, the equilibrium mixture contained 0.8 mol of oxygen. What is the value of the equilibrium constant, Kc, at the temperature of the experiment? 0 . 8 2 × 0 . 8 1 . 6 × 0 . 8 1 . 6 2 × 0 . 8 1 . 6 2 × 0 . 8 A B C D 4 2 2 . 4 2 4 2 2 . 4 2

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2007

Q11 · In the Basic Oxygen steel-making process the P4O10 impurity is removed by reacting it… 9701/11 May/June 2008

1 In the Basic Oxygen steel-making process the P4O10 impurity is removed by reacting it with calcium oxide. The only product of this reaction is the salt calcium phosphate, Ca3(PO4)2. In this reaction, how many moles of calcium oxide react with one mole of P4O10? A 1 B 1.5 C 3 D 6

1 marks

Answer: D

This question in 9701/11 May/June 2008

Q12 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2008

2 Use of the Data Booklet is relevant to this question. A typical solid fertiliser for use with household plants and shrubs contains the elements N, P, and K in the ratio of 15 g : 30 g :15 g per 100 g of fertiliser. The recommended usage of fertiliser is 14 g of fertiliser per 5 dm3 of water. What is the concentration of nitrogen atoms in this solution? A 0.03 mol dm–3 B 0.05 mol dm–3 C 0.42 mol dm–3 D 0.75 mol dm–3

1 marks

Answer: A

This question in 9701/11 May/June 2008

Q13 · The density of ice is 1.00 g cm–3 9701/11 May/June 2008

6 The density of ice is 1.00 g cm–3. What is the volume of steam produced when 1.00 cm3 of ice is heated to 323 °C (596 K) at a pressure of one atmosphere (101 kPa)? [1 mol of a gas occupies 24.0 dm3 at 25 °C (298 K) and one atmosphere.] A 0.267 dm3 B 1.33 dm3 C 2.67 dm3 D 48.0 dm3

1 marks

Answer: C

This question in 9701/11 May/June 2008

Q14 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2008

15 Use of the Data Booklet is relevant to this question. The combustion of fossil fuels is a major source of increasing atmospheric carbon dioxide, with a consequential rise in global warming. Another significant contribution to carbon dioxide levels comes from the thermal decomposition of limestone, in the manufacture of cement and of lime for agricultural purposes. Cement works roast 1000 million tonnes of limestone per year and a further 200 million tonnes is roasted in kilns to make lime. What is the total annual mass output of carbon dioxide (in million tonnes) from these two processes? A 440 B 527 C 660 D 880

1 marks

Answer: B

This question in 9701/11 May/June 2008

Q15 · For complete combustion, 1 mol of an organic compound X was found to require 2.5 mol of… 9701/11 May/June 2008

31 For complete combustion, 1 mol of an organic compound X was found to require 2.5 mol of molecular oxygen. Which compounds could be X? 1 C2H5OH 2 C2H2 3 CH3CHO

1 marks

Answer: C

This question in 9701/11 May/June 2008

Q16 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2008

1 Use of the Data Booklet is relevant to this question. Titanium(IV) oxide, TiO2, is brilliantly white and much of the oxide produced is used in the manufacture of paint. What is the maximum amount of TiO2 obtainable from 19.0 tonnes of the ore ilmenite, FeTiO3? A 10.0 tonnes B 12.7 tonnes C 14.0 tonnes D 17.7 tonnes

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2008

Q17 · Carbon disulphide vapour burns in oxygen according to the following equation 9701/11 Oct/Nov 2008

2 Carbon disulphide vapour burns in oxygen according to the following equation. CS2(g) + 3O2(g) → CO2(g) + 2SO2(g) A sample of 10 cm3 of carbon disulphide was burned in 50 cm3 of oxygen. After measuring the volume of gas remaining, the product was treated with an excess of aqueous sodium hydroxide and the volume of gas measured again. All measurements were made at the same temperature and pressure, under such conditions that carbon disulphide was gaseous. What were the measured volumes? volume of gas volume of gas after after burning / cm3 adding NaOH(aq) / cm3 A 30 0 B 30 20 C 50 20 D 50 40

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2008

Q18 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2008

30 Use of the Data Booklet is relevant to this question. Ethyl ethanoate can be obtained from ethanoic acid and ethanol by the following reaction. CH3CH2OH + CH3CO2H CH3CO2CH2CH3 + H2O Ethanol (30 g) and ethanoic acid (30 g) are heated under reflux together, and 22 g of ethyl ethanoate are obtained. What is the yield of the ester? A 25 % B 38 % C 50 % D 77 %

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2008

Q19 · A household bleach contains sodium chlorate(I), NaClO, as its active ingredient 9701/11 May/June 2009

2 A household bleach contains sodium chlorate(I), NaClO, as its active ingredient. The concentration of NaClO in the bleach can be determined by reacting a known amount with aqueous hydrogen peroxide, H2O2. NaClO(aq) + H2O2(aq) → NaCl(aq) + O2(g) + H2O(l) When 25.0 cm3 of bleach is treated with an excess of aqueous H2O2, 0.0350 mol of oxygen gas is given off. What is the concentration of NaClO in the bleach? A 8.75 × 10–4 mol dm–3 B 0.700 mol dm–3 C 0.875 mol dm–3 D 1.40 mol dm–3

1 marks

Answer: D

This question in 9701/11 May/June 2009

Q20 · 0.200 mol of a hydrocarbon undergo complete combustion to give 35.2 g of carbon dioxide… 9701/11 Oct/Nov 2009

2 0.200 mol of a hydrocarbon undergo complete combustion to give 35.2 g of carbon dioxide and 14.4 g of water as the only products. What is the molecular formula of the hydrocarbon? A C2H4 B C2H6 C C4H4 D C4H8

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2009

Q21 · During electrolysis of brine in a diaphragm cell, chlorine, hydrogen and sodium hydroxide… 9701/11 Oct/Nov 2009

16 During electrolysis of brine in a diaphragm cell, chlorine, hydrogen and sodium hydroxide are produced. What is the molar ratio of these products? chlorine hydrogen sodium hydroxide A 1 1 1 B 1 1 2 C 2 1 1 D 2 2 1

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2009

Q22 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2010

8 Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, X, reacts with an excess of chlorine to form 5.287 g of a compound with formula XCl2. What is metal X? A barium B calcium C magnesium D strontium

1 marks

Answer: D

This question in 9701/11 May/June 2010

Q23 · Which mass of gas would occupy a volume of 3 dm3 at 25 °C and 1 atmosphere pressure? 9701/12 May/June 2010

7 Which mass of gas would occupy a volume of 3 dm3 at 25 °C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm3 at 25 °C and 1 atmosphere pressure.] A 3.2 g O2 gas B 5.6 g N2 gas C 8.0 g SO2 gas D 11.0 g CO2 gas

1 marks

Answer: C

This question in 9701/12 May/June 2010

Q24 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2010

8 Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, X, reacts with an excess of chlorine to form 5.287 g of a compound with formula XCl2. What is metal X? A barium B calcium C magnesium D strontium

1 marks

Answer: D

This question in 9701/12 May/June 2010

Q25 · Which mass of gas would occupy a volume of 3 dm3 at 25 °C and 1 atmosphere pressure? 9701/13 May/June 2010

6 Which mass of gas would occupy a volume of 3 dm3 at 25 °C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm3 at 25 °C and 1 atmosphere pressure.] A 3.2 g O2 gas B 5.6 g N2 gas C 8.0 g SO2 gas D 11.0 g CO2 gas

1 marks

Answer: C

This question in 9701/13 May/June 2010

Q26 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2010

9 Use of the Data Booklet is relevant to this question. 2.920 g of a Group II metal, X, reacts with an excess of chlorine to form 5.287 g of a compound with formula XCl2. What is metal X? A barium B calcium C magnesium D strontium

1 marks

Answer: D

This question in 9701/13 May/June 2010

Q27 · Which element of the third period requires the least number of moles of oxygen for the… 9701/13 May/June 2010

19 Which element of the third period requires the least number of moles of oxygen for the complete combustion of 1 mol of the element? A aluminium B magnesium C phosphorus D sodium

1 marks

Answer: D

This question in 9701/13 May/June 2010

Q28 · In a calorimetric experiment 1.60 g of a fuel is burnt 9701/11 Oct/Nov 2010

9 In a calorimetric experiment 1.60 g of a fuel is burnt. 45 % of the energy released is absorbed by 200 g of water whose temperature rises from 18 °C to 66 °C. The specific heat capacity of water is 4.2 J g–1 K–1. What is the total energy released per gram of fuel burnt? A 25 200 J B 56 000 J C 89 600 J D 143 360 J

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2010

Q29 · The value of the equilibrium constant, Kc, for the reaction to form ethyl ethanoate from… 9701/11 Oct/Nov 2010

10 The value of the equilibrium constant, Kc, for the reaction to form ethyl ethanoate from ethanol and ethanoic acid is 4.0 at 60 °C. C2H5OH + CH3CO2H CH3CO2C2H5 + H2O When 1.0 mol of ethanol and 1.0 mol of ethanoic acid are allowed to reach equilibrium at 60 °C, what is the number of moles of ethyl ethanoate formed? A 1 B 2 C 1 D 3 3 3 4 4

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2010

Q30 · Ammonium sulfate in nitrogenous fertilisers in the soil can be slowly oxidised by air… 9701/11 Oct/Nov 2010

15 Ammonium sulfate in nitrogenous fertilisers in the soil can be slowly oxidised by air producing sulfuric acid, nitric acid and water. How many moles of oxygen gas are needed to oxidise completely one mole of ammonium sulfate? A 1 B 2 C 3 D 4

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2010

Q31 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2010

14 Use of the Data Booklet is relevant to this question. Which mass of solid residue can be obtained from the thermal decomposition of 4.10 g of anhydrous calcium nitrate? A 0.70 g B 1.00 g C 1.40 g D 2.25 g

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2010

Q32 · Use of the Data Booklet is relevant for this question 9701/12 Oct/Nov 2010

39 Use of the Data Booklet is relevant for this question. In an organic synthesis, a 62 % yield of product is achieved. Which of these conversions are consistent with this information? 1 74.00g of butan-2-ol → 44.64 g of butanone 2 74.00g of butan-1-ol → 54.56 g of butanoic acid 3 74.00g of 2-methylpropan-1-ol → 54.56 g of 2-methylpropanoic acid

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2010

Q33 · The value of the equilibrium constant, Kc, for the reaction to form ethyl ethanoate from… 9701/13 Oct/Nov 2010

10 The value of the equilibrium constant, Kc, for the reaction to form ethyl ethanoate from ethanol and ethanoic acid is 4.0 at 60 °C. C2H5OH + CH3CO2H CH3CO2C2H5 + H2O When 1.0 mol of ethanol and 1.0 mol of ethanoic acid are allowed to reach equilibrium at 60 °C, what is the number of moles of ethyl ethanoate formed? A 1 B 2 C 1 D 3 3 3 4 4

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2010

Q34 · Ammonium sulfate in nitrogenous fertilisers in the soil can be slowly oxidised by air… 9701/13 Oct/Nov 2010

15 Ammonium sulfate in nitrogenous fertilisers in the soil can be slowly oxidised by air producing sulfuric acid, nitric acid and water. How many moles of oxygen gas are needed to oxidise completely one mole of ammonium sulfate? A 1 B 2 C 3 D 4

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2010

Q35 · 50 cm3 of 2.50 mol dm–3 hydrochloric acid was placed in a polystyrene beaker of… 9701/11 May/June 2011

9 50 cm3 of 2.50 mol dm–3 hydrochloric acid was placed in a polystyrene beaker of negligible heat capacity. Its temperature was recorded and then 50 cm3 of 2.50 mol dm–3 NaOH at the same temperature was quickly added, with stirring. The temperature rose by 17 °C. The resulting solution may be considered to have a specific heat capacity of 4.2 J g–1 K–1. What is an approximate value for the molar enthalpy change of neutralisation of hydrochloric acid and sodium hydroxide from this experiment? − ( 50 x 4 . 2 x 17 ) − 1 A J mol ( 0 . 050 x 2 . 5 ) − ( 50 x 4 . 2 x 17 ) − 1 B J mol ( 0 . 10 x 2 . 5 ) − ( 100 x 4 . 2 x 17 ) − 1 C J mol ( 0 . 050 x 2 . 5 ) − ( 100 x 4 . 2 x 17 ) − 1 D J mol ( 50 x 2 . 5 )

1 marks

Answer: C

This question in 9701/11 May/June 2011

Q36 · 0.02 mol of aluminium is burned in oxygen and the product is reacted with 2.00 mol dm–3… 9701/11 May/June 2011

13 0.02 mol of aluminium is burned in oxygen and the product is reacted with 2.00 mol dm–3 hydrochloric acid. What minimum volume of acid will be required for complete reaction? A 15 cm3 B 20 cm3 C 30 cm3 D 60 cm3

1 marks

Answer: C

This question in 9701/11 May/June 2011

Q37 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2011

33 Use of the Data Booklet is relevant to this question. Zinc reacts with hydrochloric acid according to the following equation. Zn + 2HCl → ZnCl 2 + H2 Which statements are correct? [All volumes are measured at room conditions.] 1 A 3.27 g sample of zinc reacts with an excess of hydrochloric acid to give 0.050 mol of zinc chloride. 2 A 6.54 g sample of zinc reacts completely with exactly 100 cm3 of 1.00 mol dm–3 hydrochloric acid. 3 A 13.08 g sample of zinc reacts with an excess of hydrochloric acid to give 9.60 dm3 of hydrogen.

1 marks

Answer: D

This question in 9701/11 May/June 2011

Q38 · 0.144 g of an aluminium compound X react with an excess of water, to produce a gas 9701/12 May/June 2011

11 0.144 g of an aluminium compound X react with an excess of water, to produce a gas. This gas burns completely in O2 to form H2O and 72 cm3 of CO2 only. The volume of CO2 was measured at room temperature and pressure. What could be the formula of X? [C = 12.0, Al = 27.0; 1 mole of any gas occupies 24 dm3 at room temperature and pressure] A Al 2C3 B Al 3C4 C Al 4C3 D Al 5C3

1 marks

Answer: C

This question in 9701/12 May/June 2011

Q39 · 50 cm3 of 2.50 mol dm–3 hydrochloric acid was placed in a polystyrene beaker of… 9701/13 May/June 2011

8 50 cm3 of 2.50 mol dm–3 hydrochloric acid was placed in a polystyrene beaker of negligible heat capacity. Its temperature was recorded and then 50 cm3 of 2.50 mol dm–3 NaOH at the same temperature was quickly added, with stirring. The temperature rose by 17 °C. The resulting solution may be considered to have a specific heat capacity of 4.2 J g–1 K–1. What is an approximate value for the molar enthalpy change of neutralisation of hydrochloric acid and sodium hydroxide from this experiment? − ( 50 x 4 . 2 x 17 ) − 1 A J mol ( 0 . 050 x 2 . 5 ) − ( 50 x 4 . 2 x 17 ) − 1 B J mol ( 0 . 10 x 2 . 5 ) − ( 100 x 4 . 2 x 17 ) − 1 C J mol ( 0 . 050 x 2 . 5 ) − ( 100 x 4 . 2 x 17 ) − 1 D J mol ( 50 x 2 . 5 )

1 marks

Answer: C

This question in 9701/13 May/June 2011

Q40 · 0.02 mol of aluminium is burned in oxygen and the product is reacted with 2.00 mol dm–3… 9701/13 May/June 2011

12 0.02 mol of aluminium is burned in oxygen and the product is reacted with 2.00 mol dm–3 hydrochloric acid. What minimum volume of acid will be required for complete reaction? A 15 cm3 B 20 cm3 C 30 cm3 D 60 cm3

1 marks

Answer: C

This question in 9701/13 May/June 2011

Q41 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2011

32 Use of the Data Booklet is relevant to this question. Zinc reacts with hydrochloric acid according to the following equation. Zn + 2HCl → ZnCl 2 + H2 Which statements are correct? [All volumes are measured at room conditions.] 1 A 3.27 g sample of zinc reacts with an excess of hydrochloric acid to give 0.050 mol of zinc chloride. 2 A 6.54 g sample of zinc reacts completely with exactly 100 cm3 of 1.00 mol dm–3 hydrochloric acid. 3 A 13.08 g sample of zinc reacts with an excess of hydrochloric acid to give 9.60 dm3 of hydrogen.

1 marks

Answer: D

This question in 9701/13 May/June 2011

Q42 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2011

2 Use of the Data Booklet is relevant to this question. Lead(IV) chloride will oxidise bromide ions to bromine. The Pb4+ ions are reduced to Pb2+ ions in this reaction. If 6.980 g of lead(IV) chloride is added to an excess of sodium bromide solution, what mass of bromine would be produced? A 0.799 g B 1.598 g C 3.196 g D 6.392 g

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2011

Q43 · An aqueous solution was prepared containing 1.0 mol of AgNO3 and 1.0 mol of FeSO4 in 1.00… 9701/11 Oct/Nov 2011

9 An aqueous solution was prepared containing 1.0 mol of AgNO3 and 1.0 mol of FeSO4 in 1.00 dm3 of water. When equilibrium was established, there was 0.44 mol of Ag+(aq) in the mixture. Ag+(aq) + Fe2+(aq) Ag(s) + Fe3+(aq) What is the numerical value of Kc? A 0.35 B 0.62 C 1.62 D 2.89

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2011

Q44 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2011

14 Use of the Data Booklet is relevant to this question. A significant contribution to atmospheric carbon dioxide levels comes from the thermal decomposition of limestone, in the manufacture of cement and of lime for agricultural purposes. Cement works roast 1000 million tonnes of limestone per year and a further 200 million tonnes is roasted in kilns to make lime. What is the total annual mass output of carbon dioxide (in million tonnes) from these two processes? A 440 B 527 C 660 D 880

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2011

Q45 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2011

15 Use of the Data Booklet is relevant to this question. A 5.00 g sample of an anhydrous Group II metal nitrate loses 3.29 g in mass when heated strongly. Which metal is present? A magnesium B calcium C strontium D barium

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2011

Q46 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2011

25 Use of the Data Booklet is relevant to this question. 2.76 g of ethanol were mixed with an excess of aqueous acidified potassium dichromate(VI). The reaction mixture was then boiled under reflux for one hour. The organic product was then collected by distillation. The yield of product was 75.0 %. What mass of product was collected? A 1.98 g B 2.07 g C 2.70 g D 4.80 g

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2011

Q47 · The following equations the letters W, X, Y and Z all represent whole numbers 9701/12 Oct/Nov 2011

2 The following equations the letters W, X, Y and Z all represent whole numbers. When correctly balanced, which equation requires one of letters W, X, Y or Z to be 5? A WC3H7COOH + XO2 → YCO2 + ZH2O B WC4H8 + XO2 → YCO2 + ZH2O C WH3PO4 + XNaOH → YNa2HPO4 + ZH2O D WNH3 + XO2 → YN2 + ZH2O

1 marks

This question in 9701/12 Oct/Nov 2011

Q48 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2011

4 Use of the Data Booklet is relevant to this question. 560 kg of nitrogen and 120 kg of hydrogen are pressurised, heated and passed over an iron catalyst. When the mixture of gases reaches equilibrium, it contains 96 kg of hydrogen. Which mass of ammonia does it contain? A 24 kg B 68 kg C 136 kg D 680 kg

1 marks

This question in 9701/12 Oct/Nov 2011

Q49 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2011

26 Use of the Data Booklet is relevant to this question. 2.30 g of ethanol were mixed with aqueous acidified potassium dichromate(VI). The desired product was collected by immediate distillation under gentle warming. The yield of product was 70.0 %. What mass of product was collected? A 1.54 g B 1.61 g C 2.10 g D 3.14 g

1 marks

This question in 9701/12 Oct/Nov 2011

Q50 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2011

14 Use of the Data Booklet is relevant to this question. A 5.00 g sample of an anhydrous Group II metal nitrate loses 3.29 g in mass when heated strongly. Which metal is present? A magnesium B calcium C strontium D barium

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2011

Q51 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2011

15 Use of the Data Booklet is relevant to this question. A significant contribution to atmospheric carbon dioxide levels comes from the thermal decomposition of limestone, in the manufacture of cement and of lime for agricultural purposes. Cement works roast 1000 million tonnes of limestone per year and a further 200 million tonnes is roasted in kilns to make lime. What is the total annual mass output of carbon dioxide (in million tonnes) from these two processes? A 440 B 527 C 660 D 880

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2011

Q52 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2011

25 Use of the Data Booklet is relevant to this question. 2.76 g of ethanol were mixed with an excess of aqueous acidified potassium dichromate(VI). The reaction mixture was then boiled under reflux for one hour. The organic product was then collected by distillation. The yield of product was 75.0 %. What mass of product was collected? A 1.98 g B 2.07 g C 2.70 g D 4.80 g

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2011

Q53 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2012

6 Use of the Data Booklet is relevant to this question. The gas laws can be summarised in the ideal gas equation. pV = nRT 0.56 g of ethene gas is contained in a vessel at a pressure of 102 kPa and a temperature of 30 °C. What is the volume of the vessel? A 49 cm3 B 494 cm3 C 48 900 cm3 D 494 000 cm3

1 marks

Answer: B

This question in 9701/11 May/June 2012

Q54 · Two moles of compound P were placed in a vessel 9701/11 May/June 2012

9 Two moles of compound P were placed in a vessel. The compound P was partly decomposed by heating. A dynamic equilibrium between chemicals P, Q and R was established. At equilibrium, x mol of R were present and the total number of moles present was (2 + x). What is the equation for this equilibrium? A P 2Q + R B 2P 2Q + R C 2P Q + R D 2P Q + 2R

1 marks

Answer: B

This question in 9701/11 May/June 2012

Q55 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2012

13 Use of the Data Booklet is relevant to this question. When a mineral was heated in a Bunsen flame to constant mass, a colourless gas that turned lime water milky was evolved. The remaining solid was cooled and then added to aqueous hydrochloric acid. Vigorous effervescence was seen. What was the mineral? A aragonite, CaCO3 B artinite, MgCO3.Mg(OH)2.3H2O C barytocalcite, BaCO3.CaCO3 D dolomite, CaCO3.MgCO3

1 marks

Answer: C

This question in 9701/11 May/June 2012

Q56 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2012

14 Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the propellant in some fireworks. The metal oxides and nitrogen are the only products. Which volume of nitrogen, measured under room conditions, is produced when 0.783 g of anhydrous barium nitrate reacts with an excess of aluminium? A 46.8 cm3 B 72.0 cm3 C 93.6 cm3 D 144 cm3

1 marks

Answer: B

This question in 9701/11 May/June 2012

Q57 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2012

22 Use of the Data Booklet is relevant to this question. A sample of ethyl propanoate is hydrolysed by heating under reflux with aqueous sodium hydroxide. The two organic products of the hydrolysis are separated, purified and weighed. Out of the total mass of products obtained, what is the percentage by mass of each product? A 32.4 % and 67.6 % B 38.3 % and 61.7 % C 42.3 % and 57.7 % D 50.0 % and 50.0 %

1 marks

Answer: A

This question in 9701/11 May/June 2012

Q58 · A number of alcohols with the formula C4H10O are separately oxidised 9701/11 May/June 2012

38 A number of alcohols with the formula C4H10O are separately oxidised. Using 70 g of the alcohols a 62 % yield of organic product is achieved. What mass of product could be obtained? 1 42.2 g of butanone 2 51.6 g of butanoic acid 3 51.6 g of 2-methyl propanoic acid

1 marks

Answer: A

This question in 9701/11 May/June 2012

Q59 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2012

6 Use of the Data Booklet is relevant to this question. The gas laws can be summarised in the ideal gas equation. pV = nRT 0.96 g of oxygen gas is contained in a glass vessel of volume 7000 cm3 at a temperature of 30 °C. What is the pressure in the vessel? A 1.1 kPa B 2.1 kPa C 10.8 kPa D 21.6 kPa

1 marks

Answer: C

This question in 9701/12 May/June 2012

Q60 · Two moles of compound P were placed in a vessel 9701/12 May/June 2012

7 Two moles of compound P were placed in a vessel. The vessel was heated and compound P was partly decomposed to produce Q and R. A dynamic equilibrium between chemicals P, Q and R was established. At equilibrium x moles of R were present and the total number of moles present was (2 + 2 x ). What is the equation for this equilibrium reaction? A P 2Q + R B 2P 2Q + R C 2P Q + R D 2P Q + 2R

1 marks

Answer: D

This question in 9701/12 May/June 2012

Q61 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2012

20 Use of the Data Booklet is relevant to this question. A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous sodium hydroxide. The two organic products of the hydrolysis are separated, purified and weighed. Out of the total mass of products obtained, what is the percentage by mass of each product? A 32.4 % and 67.6 % B 38.3 % and 61.7 % C 42.3 % and 57.7 % D 50.0 % and 50.0 %

1 marks

Answer: C

This question in 9701/12 May/June 2012

Q62 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2012

7 Use of the Data Booklet is relevant to this question. The gas laws can be summarised in the ideal gas equation. pV = nRT 0.56 g of ethene gas is contained in a vessel at a pressure of 102 kPa and a temperature of 30 °C. What is the volume of the vessel? A 49 cm3 B 494 cm3 C 48 900 cm3 D 494 000 cm3

1 marks

Answer: B

This question in 9701/13 May/June 2012

Q63 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2012

15 Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the propellant in some fireworks. The metal oxides and nitrogen are the only products. Which volume of nitrogen, measured under room conditions, is produced when 0.783 g of anhydrous barium nitrate reacts with an excess of aluminium? A 46.8 cm3 B 72.0 cm3 C 93.6 cm3 D 144 cm3

1 marks

Answer: B

This question in 9701/13 May/June 2012

Q64 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2012

24 Use of the Data Booklet is relevant to this question. A sample of ethyl propanoate is hydrolysed by heating under reflux with aqueous sodium hydroxide. The two organic products of the hydrolysis are separated, purified and weighed. Out of the total mass of products obtained, what is the percentage by mass of each product? A 32.4 % and 67.6 % B 38.3 % and 61.7 % C 42.3 % and 57.7 % D 50.0 % and 50.0 %

1 marks

Answer: A

This question in 9701/13 May/June 2012

Q65 · A number of alcohols with the formula C4H10O are separately oxidised 9701/13 May/June 2012

37 A number of alcohols with the formula C4H10O are separately oxidised. Using 70 g of the alcohols a 62 % yield of organic product is achieved. What mass of product could be obtained? 1 42.2 g of butanone 2 51.6 g of butanoic acid 3 51.6 g of 2-methyl propanoic acid

1 marks

Answer: A

This question in 9701/13 May/June 2012

Q66 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2012

15 Use of the Data Booklet is relevant to this question. The nitrates of beryllium, calcium, magnesium, and strontium all decompose in the same way when heated. When 2.00 g of one of these anhydrous nitrates is decomposed, 1.32 g of gas is produced. What is the nitrate? A beryllium nitrate B calcium nitrate C magnesium nitrate D strontium nitrate

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2012

Q67 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2012

17 Use of the Data Booklet is relevant to this question. 1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressure, to form an oxide which contains O2– ions. What could be the identity of the metal? A calcium B magnesium C potassium D sodium

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2012

Q68 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2012

15 Use of the Data Booklet is relevant to this question. The nitrates of beryllium, calcium, magnesium, and strontium all decompose in the same way when heated. When 2.00 g of one of these anhydrous nitrates is decomposed, 1.32 g of gas is produced. What is the nitrate? A beryllium nitrate B calcium nitrate C magnesium nitrate D strontium nitrate

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2012

Q69 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2012

17 Use of the Data Booklet is relevant to this question. 1.15 g of a metallic element reacts with 300 cm3 of oxygen at 298 K and 1 atm pressure, to form an oxide which contains O2– ions. What could be the identity of the metal? A calcium B magnesium C potassium D sodium

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2012

Q70 · During steel-making the impurity P4O10 is removed by reacting it with calcium oxide 9701/13 Oct/Nov 2012

9 During steel-making the impurity P4O10 is removed by reacting it with calcium oxide. The only product of this reaction is the salt calcium phosphate, Ca3(PO4)2. In this reaction, how many moles of calcium oxide react with one mole of P4O10? A 1 B 1.5 C 3 D 6

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2012

Q71 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2012

14 Use of the Data Booklet is relevant to this question. When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is produced. What is the nitrate compound? A beryllium nitrate B calcium nitrate C magnesium nitrate D strontium nitrate

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2012

Q72 · In the Haber process, the reaction between the two gaseous reactants requires the use of… 9701/13 Oct/Nov 2012

17 In the Haber process, the reaction between the two gaseous reactants requires the use of a catalyst that contains a transition element. What is the metal and in what mole ratio do the gases react? metal mole ratio A Fe 1 : 2 B Fe 1 : 3 C V 1 : 2 D V 1 : 3

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2012

Q73 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2012

25 Use of the Data Booklet is relevant to this question. 2.30 g of ethanol were mixed with aqueous acidified potassium dichromate(VI) and the desired organic product was collected by immediate distillation under gentle warming. The yield of product was 70.0 %. What mass of product was collected? A 1.54 g B 1.61 g C 2.10 g D 2.20 g

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2012

Q74 · An element X and compound YZ react separately with acid as shown 9701/13 Oct/Nov 2012

34 An element X and compound YZ react separately with acid as shown. X(s) + 2H+(aq) → X2+(aq) + H2(g) YZ(s) + 2H+(aq) → Y2+(aq) + H2Z(g) When 1.0 g of either X or YZ is reacted with an excess of acid, the total volume of gas formed is the same. Which statements are correct? 1 Ar(X) = Mr(YZ) 2 X and Y are metals. 3 X and Y must both be in the same Group of the Periodic Table.

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2012

Q75 · A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen 9701/11 May/June 2013

2 A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen. After cooling to room temperature, the residual gas was passed through aqueous potassium hydroxide. All gas volumes were measured at the same temperature and pressure. What volume of gas was absorbed by the alkali? A 15 cm3 B 20 cm3 C 30 cm3 D 40 cm3

1 marks

Answer: C

This question in 9701/11 May/June 2013

Q76 · A solution of Sn2+ ions will reduce an acidified solution of MnO4 – ions to Mn2+ ions 9701/11 May/June 2013

11 A solution of Sn2+ ions will reduce an acidified solution of MnO4 – ions to Mn2+ ions. The Sn2+ ions are oxidised to Sn4+ ions in this reaction. How many moles of Mn2+ ions are formed when a solution containing 9.5 g of SnCl 2 (Mr: 190) is added to an excess of acidified KMnO4 solution? A 0.010 B 0.020 C 0.050 D 0.125

1 marks

Answer: B

This question in 9701/11 May/June 2013

Q77 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2013

16 Use of the Data Booklet is relevant to this question. Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a mixture of gases. One of the gases released is an oxide of nitrogen, X. 7.4 g of anhydrous magnesium nitrate is heated until no further reaction takes place. What mass of X is produced? A 1.5 g B 2.3 g C 3.0 g D 4.6 g

1 marks

Answer: D

This question in 9701/11 May/June 2013

Q78 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2013

26 Use of the Data Booklet is relevant to this question. 2.30 g of ethanol were mixed with an excess of aqueous acidified potassium dichromate(VI). The reaction mixture was then boiled under reflux for one hour. The desired organic product was then collected by distillation. The yield of product was 60.0 %. What mass of product was collected? A 1.32 g B 1.38 g C 1.80 g D 3.20 g

1 marks

Answer: C

This question in 9701/11 May/June 2013

Q79 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2013

10 Use of the Data Booklet is relevant to this question. A student mixed 25 cm3 of 0.10 mol dm–3 sodium hydroxide solution with 25 cm3 of 0.10 mol dm–3 hydrochloric acid and noted a temperature rise of 2.5 °C. What is the enthalpy change of the reaction per mole of NaOH? A –209 kJ mol–1 B –104.5 kJ mol–1 C –209 J mol–1 D –522.5 J mol–1

1 marks

Answer: A

This question in 9701/12 May/June 2013

Q80 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2013

13 Use of the Data Booklet is relevant to this question. Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a mixture of gases. One of the gases released is oxygen. 29.7 g of anhydrous magnesium nitrate is heated until no further reaction takes place. What mass of oxygen is produced? A 3.2 g B 6.4 g C 12.8 g D 19.2 g

1 marks

Answer: A

This question in 9701/12 May/June 2013

Q81 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2013

26 Use of the Data Booklet is relevant to this question. Which volume of oxygen measured at room temperature and pressure is needed for complete combustion of 0.1 mol of propan-1-ol? A 10.8 dm3 B 12.0 dm3 C 21.6 dm3 D 24.0 dm3

1 marks

Answer: A

This question in 9701/12 May/June 2013

Q82 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2013

7 Use of the Data Booklet is relevant to this question. When 0.15 g of an organic compound is vaporised, it occupies a volume of 65.0 cm3 at 405 K and 1.00 × 105 Nm–2. Using the expression pV = nRT, which of the following expressions should be used to calculate the relative molecular mass, Mr, of the compound? 0 . 15 × 65 × 10 − 6 × 1 × 10 5 A 8 . 31 × 405 B 0 . 15 × 8 . 31 × 405 1 × 10 5 × 65 × 10 − 3 0 . 15 × 65 × 10 − 3 × 1 × 10 5 C 8 . 31 × 405 D 0 . 15 × 8 . 31 × 405 1 × 10 5 × 65 × 10 − 6

1 marks

Answer: D

This question in 9701/13 May/June 2013

Q83 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2013

10 Use of the Data Booklet is relevant to this question. A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients. In a titration, a solution containing 1.00 g of washing powder requires 7.15 cm3 of 0.100 mol dm–3 sulfuric acid for complete reaction. The sodium hydrogencarbonate is the only ingredient that reacts with the acid. What is the percentage by mass of sodium hydrogencarbonate in the washing powder? A 3.0 B 6.0 C 12.0 D 24.0

1 marks

Answer: C

This question in 9701/13 May/June 2013

Q84 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2013

12 Use of the Data Booklet is relevant to this question. Anhydrous magnesium nitrate, Mg(NO3)2 , will decompose when heated, giving a white solid and a mixture of two gases X and Y. Y is oxygen. mass of X released What is the ratio ? mass of Y released A 1 B 1 C 1 D 1 0 . 174 0 . 267 0 . 348 3 . 43

1 marks

Answer: A

This question in 9701/13 May/June 2013

Q85 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2013

27 Use of the Data Booklet is relevant to this question. Which volume of oxygen, at room temperature and pressure, is needed for complete combustion of 0.1 mol of ethanol? A 7.2 dm3 B 8.4 dm3 C 14.4 dm3 D 16.8 dm3

1 marks

Answer: A

This question in 9701/13 May/June 2013

Q86 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2013

12 Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the propellant in some fireworks. The reaction produces the metal oxides and nitrogen. 10Al + 3Ba(NO3)2 → 5Al 2O3 + 3BaO + 3N2 Which mass of barium oxide is produced when 5.40 g of aluminium powder reacts with an excess of anhydrous barium nitrate? A 1.62 g B 3.06 g C 9.18 g D 10.2 g

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2013

Q87 · A student mixed 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of… 9701/11 May/June 2014

5 A student mixed 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.350 mol dm–3 hydrochloric acid. The temperature rose by 2.50 °C. Assume that no heat was lost to the surroundings. The final mixture had a specific heat capacity of 4.20 J cm –3 K–1. What is the molar enthalpy change for the reaction? A –150 kJ mol–1 B –60.0 kJ mol–1 C –30.0 kJ mol–1 D –0.150 kJ mol–1

1 marks

Answer: B

This question in 9701/11 May/June 2014

Q88 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2014

18 Use of the Data Booklet is relevant to this question. A chemist took 2.00 dm3 of nitrogen gas, measured under room conditions, and reacted it with a large volume of hydrogen gas, in order to produce ammonia. Only 15.0% of the nitrogen gas reacted to produce ammonia. What mass of ammonia was formed? A 0.213 g B 0.425 g C 1.42 g D 2.83 g

1 marks

Answer: B

This question in 9701/11 May/June 2014

Q89 · How many moles of oxygen molecules are needed for the complete combustion of one mole of… 9701/11 May/June 2014

26 How many moles of oxygen molecules are needed for the complete combustion of one mole of 3-methylpent-2-ene? A 9 B 9 2 1 C 18 D 19

1 marks

Answer: A

This question in 9701/11 May/June 2014

Q90 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2014

40 Use of the Data Booklet is relevant to this question. In an organic synthesis, a 62% yield of product is achieved. Which conversions are consistent with this information? 1 74.00 g of butan-2-ol → 44.64 g of butanone 2 74.00 g of butan-1-ol → 54.56 g of butanoic acid 3 74.00 g of 2-methylpropan-1-ol → 54.56 g of 2-methylpropanoic acid

1 marks

Answer: A

This question in 9701/11 May/June 2014

Q91 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2014

9 Use of the Data Booklet is relevant to this question. In an experiment, 12.0 dm3 of oxygen, measured under room conditions, is used to burn completely 0.10 mol of propan-1-ol. What is the final volume of gas, measured under room conditions? A 7.20 dm3 B 8.40 dm3 C 16.8 dm3 D 18.00 dm3

1 marks

Answer: B

This question in 9701/12 May/June 2014

Q92 · Ammonium sulfate in the soil is slowly oxidised by air, producing sulfuric acid, nitric… 9701/12 May/June 2014

14 Ammonium sulfate in the soil is slowly oxidised by air, producing sulfuric acid, nitric acid and water as the only products. How many moles of oxygen gas are needed for the complete oxidation of one mole of ammonium sulfate? A 1 B 2 C 3 D 4

1 marks

Answer: D

This question in 9701/12 May/June 2014

Q93 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2014

19 Use of the Data Booklet is relevant to this question. In an experiment, 0.125 mol of chlorine gas, Cl 2, is reacted with an excess of cold aqueous sodium hydroxide. One of the products is a compound of sodium, oxygen, and chlorine. Which mass of this product is formed? A 9.31 g B 13.3 g C 18.6 g D 26.6 g

1 marks

Answer: A

This question in 9701/12 May/June 2014

Q94 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2014

17 Use of the Data Booklet is relevant to this question. In an experiment, 0.6 mol of chlorine gas, Cl 2, is reacted with an excess of hot aqueous sodium hydroxide. One of the products is a compound of sodium, oxygen and chlorine. Which mass of this product is formed? A 21.3 g B 44.7 g C 63.9 g D 128 g

1 marks

Answer: A

This question in 9701/13 May/June 2014

Q95 · A student investigates four different fuels 9701/13 May/June 2014

24 A student investigates four different fuels. Each fuel is used separately to raise the temperature of 1 dm3 of water from 20 °C to 100 °C. Each fuel undergoes complete combustion. All other conditions are the same in each experiment. Which fuel would produce the smallest amount of carbon dioxide in these experiments? energy released fuel per mole of fuel A ethanol 1367 kJ mol–1 B methane 890 kJ mol–1 C methanol 715 kJ mol–1 D propane 2220 kJ mol–1

1 marks

Answer: B

This question in 9701/13 May/June 2014

Q96 · Aluminium carbide, Al 4C3, reacts readily with aqueous sodium hydroxide 9701/11 Oct/Nov 2014

6 Aluminium carbide, Al 4C3, reacts readily with aqueous sodium hydroxide. The two products of the reaction are NaAl O2 and a hydrocarbon. Water molecules are also involved as reactants. What is the formula of the hydrocarbon? A CH4 B C2H6 C C3H8 D C6H12

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2014

Q97 · In an experiment to calculate the enthalpy change of combustion of a fuel, 1.5 g (0.0326… 9701/11 Oct/Nov 2014

7 In an experiment to calculate the enthalpy change of combustion of a fuel, 1.5 g (0.0326 mol) of the fuel was used to heat 200 g of water. The temperature of the water rose from 25 °C to 55 °C. The specific heat capacity of water is 4.18 J g–1 K–1. There is significant heat loss in this experiment. Therefore, the experimental value for the enthalpy change of combustion, ∆Hc, of the fuel will be different from the theoretical value. Using the information above, what is the experimental value for the enthalpy change of combustion, ∆Hc, of the fuel? A –1410 kJ mol–1 B –769 kJ mol–1 C –30.7 kJ mol–1 D –16.7 kJ mol–1

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2014

Q98 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2014

15 Use of the Data Booklet is relevant to this question. A sample of potassium oxide, K2O, is dissolved in 250 cm3 of distilled water. 25.0 cm3 of this solution is titrated against sulfuric acid of concentration 2.00 mol dm–3. 15.0 cm3 of this sulfuric acid is needed for complete neutralisation. Which mass of potassium oxide was originally dissolved in 250 cm3 of distilled water? A 2.83 g B 28.3 g C 47.1 g D 56.6 g

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2014

Q99 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2014

15 Use of the Data Booklet is relevant to this question. A sample of potassium oxide, K2O, is dissolved in 250 cm3 of distilled water. 25.0 cm3 of this solution is titrated against sulfuric acid of concentration 2.00 mol dm–3. 15.0 cm3 of this sulfuric acid is needed for complete neutralisation. Which mass of potassium oxide was originally dissolved in 250 cm3 of distilled water? A 2.83 g B 28.3 g C 47.1 g D 56.6 g

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2014

Q100 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2014

8 Use of the Data Booklet is relevant to this question. Ferrochrome is an alloy of iron and chromium. Ferrochrome can be dissolved in dilute sulfuric acid to produce a mixture of FeSO4 and Cr2(SO4)3. The FeSO4 reacts with K2Cr2O7 in acid solution according to the following equation. 14H+ + 6Fe2+ + Cr2O7 2– → 2Cr3+ + 6Fe3+ + 7H2O When 1.00 g of ferrochrome is dissolved in dilute sulfuric acid, and the resulting solution titrated, 13.1 cm3 of 0.100 mol dm–3 K2Cr2O7 is required for complete reaction. What is the percentage by mass of Fe in the sample of ferrochrome? A 1.22 B 4.39 C 12.2 D 43.9

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2014

Q101 · Use of the Data Booklet is relevant to this question 9701/13 Oct/Nov 2014

11 Use of the Data Booklet is relevant to this question. When 0.47 g of a hydrocarbon was completely burnt in air, the energy released heated 200 g of water from 23.7 °C to 41.0 °C. What was the amount of energy absorbed by the water? A 0.47 × 4.18 × 17.3 J B 0.47 × 4.18 × (273 + 17.3) J C 200 × 4.18 × 17.3 J D 200 × 4.18 × (273 + 17.3) J

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2014

Q102 · What is the ionic equation for the reaction between aqueous sodium carbonate and dilute… 9701/13 Oct/Nov 2014

12 What is the ionic equation for the reaction between aqueous sodium carbonate and dilute nitric acid? A 2HNO3(aq) + CO3 2–(aq) → H2O(l) + CO2(g) + 2NO3 –(aq) B 2H+(aq) + CO3 2–(aq) → CO2(g) + H2O(l) C 2HNO3(aq) + Na2CO3(aq) → 2NaNO3(aq) + CO2(g) + H2O(l) D 2HNO2(aq) + CO3 2–(aq) → H2O(l) + CO2(g) + 2NO2 –(aq)

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2014

Q103 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2015

3 Use of the Data Booklet is relevant to this question. 1.00 g of carbon is combusted in a limited supply of pure oxygen. 0.50 g of the carbon combusts to form CO2 and 0.50 g of the carbon combusts to form CO. The resultant mixture of CO2 and CO is passed through excess NaOH(aq) and the remaining gas is then dried and collected. What is the volume of the remaining gas? (All gas volumes are measured at 25 °C and 1 atmosphere pressure.) A 1 dm3 B 1.5 dm3 C 2 dm3 D 3 dm3

1 marks

Answer: A

This question in 9701/11 May/June 2015

Q104 · The three minerals below are obtained from mines around the world 9701/11 May/June 2015

13 The three minerals below are obtained from mines around the world. Each one behaves as a mixture of two carbonate compounds. They can be used as fire retardants because they decompose in the heat, producing CO2. This gas smothers the fire. barytocite BaCa(CO3)2 dolomite CaMg(CO3)2 huntite Mg3Ca(CO3)4 What is the order of effectiveness as fire retardant, from best to worst? best worst A dolomite barytocite huntite B dolomite huntite barytocite C huntite barytocite dolomite D huntite dolomite barytocite

1 marks

Answer: D

This question in 9701/11 May/June 2015

Q105 · Use of the Data Booklet is relevant to this question 9701/11 May/June 2015

19 Use of the Data Booklet is relevant to this question. Which mass of solid residue will be obtained from the thermal decomposition of 4.10 g of anhydrous calcium nitrate? A 0.70 g B 1.00 g C 1.40 g D 2.25 g

1 marks

Answer: C

This question in 9701/11 May/June 2015

Q106 · The citrus flavour of lemons is due to the compound limonene, present in both the peel… 9701/11 May/June 2015

29 The citrus flavour of lemons is due to the compound limonene, present in both the peel and the juice. limonene What is the mole ratio of carbon dioxide to water produced when limonene is completely burnt in oxygen? number of moles number of moles carbon dioxide water A 4 3 B 5 4 C 5 8 D 9 7

1 marks

Answer: B

This question in 9701/11 May/June 2015

Q107 · The shell of a chicken’s egg makes up 5% of the mass of an average egg 9701/12 May/June 2015

2 The shell of a chicken’s egg makes up 5% of the mass of an average egg. An average egg has a mass of 50 g. Assume the egg shell is pure calcium carbonate. How many complete chicken’s egg shells would be needed to neutralise 50 cm3 of 2.0 mol dm–3 ethanoic acid? A 1 B 2 C 3 D 4

1 marks

Answer: B

This question in 9701/12 May/June 2015

Q108 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2015

12 Use of the Data Booklet is relevant to this question. When 3.00 g of an anhydrous nitrate of a Group II metal is decomposed, 1.53 g of gas is produced. What is the nitrate compound? A beryllium nitrate B calcium nitrate C magnesium nitrate D strontium nitrate

1 marks

Answer: D

This question in 9701/12 May/June 2015

Q109 · Use of the Data Booklet is relevant to this question 9701/12 May/June 2015

26 Use of the Data Booklet is relevant to this question. 2.40 g of propan-2-ol were mixed with excess acidified potassium dichromate(VI). The reaction mixture was then boiled under reflux for twenty minutes. The organic product was then collected by distillation. The yield of product was 75.0%. What mass of product was collected? A 1.74 g B 1.80 g C 2.22 g D 2.32 g

1 marks

Answer: A

This question in 9701/12 May/June 2015

Q110 · Citric acid is found in lemon juice 9701/12 May/June 2015

29 Citric acid is found in lemon juice. HO2CCH2C(OH)(CO2H)CH2CO2H citric acid What is the volume of 0.4 mol dm–3 sodium hydroxide solution required to neutralise a solution containing 0.005 mol of citric acid? A 12.5 cm3 B 25.0 cm3 C 37.5 cm3 D 50.0 cm3

1 marks

Answer: C

This question in 9701/12 May/June 2015

Q111 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2015

13 Use of the Data Booklet is relevant to this question. The reaction between aluminium powder and anhydrous barium nitrate is used as the propellant in some fireworks. The metal oxides and nitrogen are the only products. Which volume of nitrogen, measured under room conditions, is produced when 0.783 g of anhydrous barium nitrate reacts with an excess of aluminium? A 46.8 cm3 B 72.0 cm3 C 93.6 cm3 D 144 cm3

1 marks

This question in 9701/12 Oct/Nov 2015

Q112 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2015

16 Use of the Data Booklet is relevant to this question. Brine is concentrated aqueous sodium chloride. In the commercial electrolysis of brine, the products are chlorine, hydrogen and sodium hydroxide. What is the maximum yield of each of these products when 58.5 kg of sodium chloride are electrolysed as brine? yield of yield of yield of sodium chlorine / kg hydrogen / kg hydroxide / kg A 35.5 1 40 B 35.5 2 40 C 71 1 40 D 71 2 80

1 marks

This question in 9701/12 Oct/Nov 2015

Q113 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2015

19 Use of the Data Booklet is relevant to this question. 4.70 g of an ammonium salt is heated with excess aqueous sodium hydroxide. The volume of ammonia gas given off, measured at room temperature and pressure, is 1.41 dm3. Which ammonium salt was used? A ammonium bromide (Mr = 97.9) B ammonium carbonate (Mr = 96) C ammonium nitrate (Mr = 80) D ammonium sulfate (Mr = 132.1)

1 marks

This question in 9701/12 Oct/Nov 2015

Q114 · What is the volume of steam produced when 1.00 g of ice is heated to 323 °C at a pressure… 9701/12 Feb/March 2016

7 What is the volume of steam produced when 1.00 g of ice is heated to 323 °C at a pressure of 101 kPa? A 0.27 dm3 B 1.3 dm3 C 2.7 dm3 D 48 dm3

1 marks

Answer: C

This question in 9701/12 Feb/March 2016

Q115 · In an experiment, 2.00 mol of hydrogen and 3.00 mol of iodine were heated together in a… 9701/12 Feb/March 2016

11 In an experiment, 2.00 mol of hydrogen and 3.00 mol of iodine were heated together in a sealed container and allowed to reach equilibrium at a fixed temperature. The container had a fixed volume of 1.00 dm3. At equilibrium, there were 2.40 mol of iodine present in the mixture. H2(g) + I2(g) 2HI(g) What is the value of the equilibrium constant, Kc? A 0.107 B 0.357 C 0.429 D 2.33

1 marks

Answer: C

This question in 9701/12 Feb/March 2016

Q116 · A white powder is known to be a mixture of magnesium oxide and aluminium oxide 9701/11 May/June 2016

6 A white powder is known to be a mixture of magnesium oxide and aluminium oxide. 100 cm3 of 2 mol dm–3 NaOH(aq) is just sufficient to cause the aluminium oxide in x grams of the mixture to dissolve. The reaction occurring is Al 2O3 + 2OH– + 3H2O → 2Al (OH)4 –. 800 cm3 of 2 mol dm–3 HCl (aq) is just sufficient to cause all of the oxide in x grams of the mixture to dissolve. The reactions occurring are Al 2O3 + 6H+ → 2Al 3+ + 3H2O and MgO + 2H+ → Mg2+ + H2O. How many moles of each oxide are present in x grams of the mixture? aluminium magnesium oxide oxide A 0.05 0.25 B 0.05 0.50 C 0.10 0.25 D 0.10 0.50

1 marks

Answer: D

This question in 9701/11 May/June 2016

Q117 · A piece of rock has a mass of 2.00 g 9701/11 May/June 2016

17 A piece of rock has a mass of 2.00 g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0 cm3 of 0.500 mol dm–3 hydrochloric acid. What is the percentage of calcium carbonate in the 2.00 g piece of rock? A 22.5% B 45.0% C 72.0% D 90.1%

1 marks

Answer: B

This question in 9701/11 May/June 2016

Q118 · When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3… 9701/12 May/June 2016

10 When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are formed. NH4Cl (s) NH3(g) + HCl (g) The initial amount of ammonium chloride was 1.00 mol, and when the system had reached equilibrium there was 0.300 mol of ammonium chloride. What is the numerical value of Kc for this reaction under these conditions? A 0.490 B 1.63 C 1.96 D 3.27

1 marks

Answer: C

This question in 9701/12 May/June 2016

Q119 · A 0.005 mol sample of anhydrous calcium carbonate was completely thermally decomposed to… 9701/12 May/June 2016

14 A 0.005 mol sample of anhydrous calcium carbonate was completely thermally decomposed to give 100 cm3 of gas measured at a certain temperature and pressure. In a separate experiment carried out at the same temperature and pressure, a 0.005 mol sample of anhydrous calcium nitrate was completely thermally decomposed. The volume of gaseous products was measured. What total volume of gaseous products was produced from the calcium nitrate? A 50 cm3 B 100 cm3 C 200 cm3 D 250 cm3

1 marks

Answer: D

This question in 9701/12 May/June 2016

Q120 · An excess of chlorine gas, Cl 2, is passed through 60 cm3 of cold aqueous 0.1 mol dm–3… 9701/12 May/June 2016

18 An excess of chlorine gas, Cl 2, is passed through 60 cm3 of cold aqueous 0.1 mol dm–3 sodium hydroxide. In a separate experiment an excess of chlorine gas is passed through 60 cm3 of hot aqueous 0.1 mol dm–3 sodium hydroxide until no further reaction takes place. How much more sodium chloride will be produced by the reaction with hot NaOH than with cold NaOH? A 0.002 moles B 0.003 moles C 0.005 moles D 0.006 moles

1 marks

Answer: A

This question in 9701/12 May/June 2016

Q121 · In an experiment, 10 cm3 of an organic compound, J, in the gaseous state was sparked with… 9701/12 May/June 2016

31 In an experiment, 10 cm3 of an organic compound, J, in the gaseous state was sparked with an excess of oxygen. 20 cm3 of carbon dioxide and 5 cm3 of nitrogen were obtained among the products. All gas volumes were measured at the same temperature and pressure. What could be the identity of J? 1 C2H6N2 2 C2H3N 3 C2H7N

1 marks

Answer: C

This question in 9701/12 May/June 2016

Q122 · Anhydrous magnesium nitrate, Mg(NO3)2 , will decompose when heated, giving a white solid… 9701/13 May/June 2016

15 Anhydrous magnesium nitrate, Mg(NO3)2 , will decompose when heated, giving a white solid and a mixture of two gases X and Y. Y is oxygen. mass of X released What is the ratio ? mass of Y released A 1 B 1 C 1 D 1 0 . 174 0 . 267 0 . 348 3 . 43

1 marks

Answer: A

This question in 9701/13 May/June 2016

Q123 · Which volume of oxygen, at room temperature and pressure, is needed for complete… 9701/13 May/June 2016

26 Which volume of oxygen, at room temperature and pressure, is needed for complete combustion of 1.0 mol of methylpropan-1-ol? A 108 dm3 B 144 dm3 C 156 dm3 D 288 dm3

1 marks

Answer: B

This question in 9701/13 May/June 2016

Q124 · An important reaction in the manufacture of nitric acid is the catalytic oxidation of… 9701/11 Oct/Nov 2016

8 An important reaction in the manufacture of nitric acid is the catalytic oxidation of ammonia. 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) For every mole of O2 that reacts in this way, 181.8 kJ of energy are released. A factory makes 2.50 × 105 mol of NO every day. How much energy, in kJ, is released every day? A 3.64 × 107 B 4.55 × 107 C 5.68 × 107 D 2.27 × 108

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2016

Q125 · 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, at 298 K and… 9701/11 Oct/Nov 2016

12 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, at 298 K and 1 atm pressure, to form an oxide which contains O2– ions. What could be the identity of this metallic element? A calcium B magnesium C potassium D sodium

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2016

Q126 · Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a… 9701/11 Oct/Nov 2016

16 Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a mixture of gases. One of the gases released is an oxide of nitrogen, X. 7.4 g of anhydrous magnesium nitrate is heated until no further reaction takes place. What mass of X is produced? A 1.5 g B 2.3 g C 3.0 g D 4.6 g

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2016

Q127 · An important reaction in the manufacture of nitric acid is the catalytic oxidation of… 9701/13 Oct/Nov 2016

8 An important reaction in the manufacture of nitric acid is the catalytic oxidation of ammonia. 4NH3(g) + 5O2(g) 4NO(g) + 6H2O(g) For every mole of O2 that reacts in this way, 181.8 kJ of energy are released. A factory makes 2.50 × 105 mol of NO every day. How much energy, in kJ, is released every day? A 3.64 × 107 B 4.55 × 107 C 5.68 × 107 D 2.27 × 108

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2016

Q128 · 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, at 298 K and… 9701/13 Oct/Nov 2016

12 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, at 298 K and 1 atm pressure, to form an oxide which contains O2– ions. What could be the identity of this metallic element? A calcium B magnesium C potassium D sodium

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2016

Q129 · Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a… 9701/13 Oct/Nov 2016

16 Magnesium nitrate, Mg(NO3)2, will decompose when heated to give a white solid and a mixture of gases. One of the gases released is an oxide of nitrogen, X. 7.4 g of anhydrous magnesium nitrate is heated until no further reaction takes place. What mass of X is produced? A 1.5 g B 2.3 g C 3.0 g D 4.6 g

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2016

Q130 · In some fireworks there is a reaction between powdered aluminium and powdered barium… 9701/12 May/June 2017

3 In some fireworks there is a reaction between powdered aluminium and powdered barium nitrate. Heat is evolved, an unreactive gas is produced, and all nitrogen atoms are reduced. What is the equation for this reaction? A 2Al + Ba(NO3)2 → Al 2O3 + BaO + 2NO B 4Al + 4Ba(NO3)2 → 2Al 2O3 + 4Ba(NO2)2 + O2 C 10Al + 3Ba(NO3)2 → 5Al 2O3 + 3BaO + 3N2 D 10Al + 18Ba(NO3)2 → 10Al (NO3)3 + 18BaO + 3N2

1 marks

Answer: C

This question in 9701/12 May/June 2017

Q131 · A chemist took 2.00 dm3 of nitrogen gas, measured under room conditions, and reacted it… 9701/12 May/June 2017

19 A chemist took 2.00 dm3 of nitrogen gas, measured under room conditions, and reacted it with a large volume of hydrogen gas to produce ammonia. Only 15.0% of the nitrogen gas reacted to produce ammonia. Which mass of ammonia was formed? A 0.213 g B 0.425 g C 1.42 g D 2.83 g

1 marks

Answer: B

This question in 9701/12 May/June 2017

Q132 · A 0.216 g sample of an aluminium compound X reacts with an excess of water to produce a… 9701/13 May/June 2017

2 A 0.216 g sample of an aluminium compound X reacts with an excess of water to produce a single hydrocarbon gas. This gas burns completely in O2 to form H2O and CO2 only. The volume of CO2 at room temperature and pressure is 108 cm3. What is the formula of X? A Al 2C3 B Al 3C2 C Al 3C4 D Al 4C3

1 marks

Answer: D

This question in 9701/13 May/June 2017

Q133 · Which equation correctly describes the complete combustion of an alkene, CnH2n? 9701/13 May/June 2017

3 Which equation correctly describes the complete combustion of an alkene, CnH2n? A CnH2n + 2 3 nO2 → nCO2 + 2nH2O B CnH2n + 2 3 nO2 → nCO2 + nH2O C CnH2n + 2nO2 → nCO2 + nH2O D CnH2n + 2nO2 → nCO2 + 2nH2O

1 marks

Answer: B

This question in 9701/13 May/June 2017

Q134 · What would be produced when 60 g of nitrogen monoxide react with an excess of carbon… 9701/13 May/June 2017

19 What would be produced when 60 g of nitrogen monoxide react with an excess of carbon monoxide in a catalytic converter? A 12 g of carbon and 92 g of nitrogen dioxide B 24 g of carbon and 92 g of nitrogen dioxide C 88 g of carbon dioxide and 28 g of nitrogen D 88 g of carbon dioxide and 56 g of nitrogen

1 marks

Answer: C

This question in 9701/13 May/June 2017

Q135 · A student makes sodium chloride by reacting together 0.025 mol of sodium carbonate with… 9701/11 Oct/Nov 2017

32 A student makes sodium chloride by reacting together 0.025 mol of sodium carbonate with an excess of 0.2 mol dm–3 hydrochloric acid. Na2CO3 + 2HCl → 2NaCl + H2O + CO2 Which statements about the quantities of substance are correct? 1 600 cm3 of carbon dioxide are produced at room temperature and pressure. 2 250 cm3 of the hydrochloric acid are needed to exactly neutralise the sodium carbonate. 3 1.46 g of sodium chloride are produced.

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2017

Q136 · The airbags in cars contain sodium azide, NaN3, and an excess of potassium nitrate, KNO3 9701/12 Oct/Nov 2017

3 The airbags in cars contain sodium azide, NaN3, and an excess of potassium nitrate, KNO3. In a car accident, the reactions shown occur, producing nitrogen. This causes the airbag to inflate rapidly. 2NaN3 → 2Na + 3N2 10Na + 2KNO3 → K2O + 5Na2O + N2 How many moles of nitrogen gas are produced in total when 1 mol of sodium azide, NaN3, decomposes in an airbag? A 1.5 B 1.6 C 3.2 D 4.0

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2017

Q137 · Exactly 3.705 kg of substance Y are needed to neutralise 100 moles of HCl (aq) 9701/12 Oct/Nov 2017

15 Exactly 3.705 kg of substance Y are needed to neutralise 100 moles of HCl (aq). What could be substance Y? A Ca B CaO C Ca(OH)2 D CaCO3

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2017

Q138 · In an experiment, 0.125 mol of chlorine gas, Cl 2, is reacted with an excess of cold… 9701/12 Oct/Nov 2017

16 In an experiment, 0.125 mol of chlorine gas, Cl 2, is reacted with an excess of cold, aqueous sodium hydroxide. One of the products is a compound of sodium, oxygen and chlorine. Which mass of this product is formed? A 9.31 g B 13.3 g C 18.6 g D 26.6 g

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2017

Q139 · A student makes sodium chloride by reacting together 0.025 mol of sodium carbonate with… 9701/13 Oct/Nov 2017

32 A student makes sodium chloride by reacting together 0.025 mol of sodium carbonate with an excess of 0.2 mol dm–3 hydrochloric acid. Na2CO3 + 2HCl → 2NaCl + H2O + CO2 Which statements about the quantities of substance are correct? 1 600 cm3 of carbon dioxide are produced at room temperature and pressure. 2 250 cm3 of the hydrochloric acid are needed to exactly neutralise the sodium carbonate. 3 1.46 g of sodium chloride are produced.

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2017

Q140 · Which mass of solid residue is obtained from the thermal decomposition of 4.10 g of… 9701/12 Feb/March 2018

5 Which mass of solid residue is obtained from the thermal decomposition of 4.10 g of anhydrous calcium nitrate? A 0.70 g B 1.00 g C 1.40 g D 2.25 g

1 marks

Answer: C

This question in 9701/12 Feb/March 2018

Q141 · Sodium hydroxide neutralises acid 9701/12 Feb/March 2018

6 Sodium hydroxide neutralises acid. H+ + OH– → H2O In a 11 000 dm3 sample of an aqueous solution, the concentration of acid, [H+], is 1.26 × 10– 3 mol dm–3. Which mass of solid sodium hydroxide neutralises the acid? A 0.0214 g B 0.0504 g C 236 g D 554 g

1 marks

Answer: D

This question in 9701/12 Feb/March 2018

Q142 · Which volume of hydrogen, measured under room conditions, is produced when 0.160 g of… 9701/12 Feb/March 2018

25 Which volume of hydrogen, measured under room conditions, is produced when 0.160 g of methanol reacts with an excess of sodium? A 60 cm3 B 120 cm3 C 240 cm3 D 480 cm3

1 marks

Answer: A

This question in 9701/12 Feb/March 2018

Q143 · Which fuel would produce the largest mass of CO2 when 10 kg of the fuel undergo complete… 9701/11 May/June 2018

3 Which fuel would produce the largest mass of CO2 when 10 kg of the fuel undergo complete combustion? A biodiesel, C17H34O2 B ethanol, C2H6O C octane, C8H18 D propane, C3H8

1 marks

Answer: C

This question in 9701/11 May/June 2018

Q144 · When 3.00 g of an anhydrous nitrate of a Group 2 metal is decomposed, 1.53 g of gas is… 9701/11 May/June 2018

18 When 3.00 g of an anhydrous nitrate of a Group 2 metal is decomposed, 1.53 g of gas is produced. What is the nitrate compound? A beryllium nitrate B calcium nitrate C magnesium nitrate D strontium nitrate

1 marks

Answer: D

This question in 9701/11 May/June 2018

Q145 · To manufacture cement, 1000 million tonnes of limestone are decomposed each year 9701/12 May/June 2018

15 To manufacture cement, 1000 million tonnes of limestone are decomposed each year. To manufacture lime for agriculture, 200 million tonnes of limestone are decomposed each year. What is the total mass of carbon dioxide in million tonnes produced from these two processes in a year? A 440 B 528 C 660 D 880

1 marks

Answer: B

This question in 9701/12 May/June 2018

Q146 · Three samples of chlorine gas each contain 0.710 g of chlorine 9701/12 May/June 2018

35 Three samples of chlorine gas each contain 0.710 g of chlorine. Each sample is reacted with a reagent. ● In the first reaction a sample is reacted completely with hydrogen gas. ● In the second reaction a sample is reacted completely with cold NaOH(aq). ● In the third reaction a sample is reacted completely with hot NaOH(aq). Which masses of the named products would be formed? 1 Exactly 0.730 g of HCl form in the first reaction. 2 Exactly 0.585 g of NaCl form in the second reaction. 3 Exactly 0.975 g of NaCl form in the third reaction.

1 marks

Answer: A

This question in 9701/12 May/June 2018

Q147 · Aspirin, C9H8O4, Mr = 180.0, can be made by a reaction between 2-hydroxybenzoic acid… 9701/13 May/June 2018

5 Aspirin, C9H8O4, Mr = 180.0, can be made by a reaction between 2-hydroxybenzoic acid, C7H6O3, Mr = 138.0, and ethanoic anhydride, C4H6O3, Mr = 102.0. The balanced equation for the reaction is shown. C7H6O3 + C4H6O3 → C9H8O4 + C2H4O2 If a reaction mixture consists of 10.0 g of each of the two reactants, what is the maximum mass of aspirin that can be produced? A 5.7 g B 10.0 g C 13.0 g D 17.6 g

1 marks

Answer: C

This question in 9701/13 May/June 2018

Q148 · When 0.0075 mol of alcohol X are completely burnt in excess oxygen and the gases produced… 9701/13 May/June 2018

26 When 0.0075 mol of alcohol X are completely burnt in excess oxygen and the gases produced are passed through an excess of limewater (calcium hydroxide solution), 3.0 g of calcium carbonate are produced. When X is warmed with acidified potassium dichromate(VI) there is a colour change from orange to green. What could be the identity of X? A CH3CH(OH)CH2CH3 B (CH3)3COH C CH3CH2CH2OH D CH3CH(OH)CH3

1 marks

Answer: A

This question in 9701/13 May/June 2018

Q149 · A sample of the hydrocarbon C6H12 is completely burned in dry oxygen and the product… 9701/11 Oct/Nov 2018

3 A sample of the hydrocarbon C6H12 is completely burned in dry oxygen and the product gases are collected as shown. product gases, H2O + CO2 + excess of O2 excess of O2 P Q anhydrous soda lime calcium chloride (to absorb CO2) (to absorb H2O) The increases in mass of the collecting vessels P and Q are MP and MQ, respectively. What is the ratio MP / MQ? A 0.41 B 0.82 C 1.2 D 2.4

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2018

Q150 · In this question you should assume methane behaves as an ideal gas 9701/11 Oct/Nov 2018

5 In this question you should assume methane behaves as an ideal gas. The gas laws can be summarised in the ideal gas equation below. pV = nRT The volume of a sample of methane is measured at a temperature of 60 °C and a pressure of 103 kPa. The volume measured is 5.37 × 10–3 m3. What is the mass of the sample of methane, given to two significant figures? A 0.0032 g B 0.018 g C 3.2 g D 18 g

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2018

Q151 · A butane burner is used to heat water 9701/11 Oct/Nov 2018

6 A butane burner is used to heat water. The Mr of butane is 58. ● of butane is –2877 kJ mol–1. ● 250 g of water is heated from 12 °C to 100 °C. ● The burner transfers 47% of the heat released from the burning fuel to the water. Assume that the butane undergoes complete combustion and none of the water evaporates. What is the minimum mass of butane that must be burnt? A 0.068 g B 1.85 g C 3.94 g D 4.48 g

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2018

Q152 · 0.200 mol of sulfur dioxide and 0.200 mol of oxygen are placed in a 1.00 dm3 sealed… 9701/11 Oct/Nov 2018

10 0.200 mol of sulfur dioxide and 0.200 mol of oxygen are placed in a 1.00 dm3 sealed container. The gases are allowed to react until equilibrium is reached. 2SO2 + O2 2SO3 At equilibrium there is 0.100 mol of SO3 in the container. What is the value of Kc? A 0.150 mol dm–3 B 0.800 mol dm–3 C 1.25 mol–1 dm3 D 6.67 mol–1 dm3

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2018

Q153 · An organic molecule W contains 3 carbon atoms 9701/11 Oct/Nov 2018

24 An organic molecule W contains 3 carbon atoms. It requires 4.5 molecules of oxygen for complete combustion. What could W be? A propane B propanoic acid C propanone D propan-1-ol

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2018

Q154 · Exactly 1.00 g of a metallic element reacts completely with 300 cm3 of oxygen at 298 K… 9701/12 Oct/Nov 2018

6 Exactly 1.00 g of a metallic element reacts completely with 300 cm3 of oxygen at 298 K and 1 atm pressure to form an oxide which contains O2– ions. The volume of one mole of gas at this temperature and pressure is 24.0 dm3. What could be the identity of the metal? A calcium B magnesium C potassium D sodium

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2018

Q155 · A 4.00 g sample of an anhydrous Group 2 metal nitrate is heated strongly until there is… 9701/12 Oct/Nov 2018

14 A 4.00 g sample of an anhydrous Group 2 metal nitrate is heated strongly until there is no further change. A solid residue of mass 1.37 g is formed. Which metal is present? A barium B calcium C magnesium D strontium

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2018

Q156 · Zinc reacts with hydrochloric acid according to the following equation 9701/12 Oct/Nov 2018

31 Zinc reacts with hydrochloric acid according to the following equation. Zn + 2HCl → ZnCl 2 + H2 Which statements are correct? 1 A 3.27 g sample of zinc reacts with an excess of hydrochloric acid to give 0.0500 mol of zinc chloride. 2 A 6.54 g sample of zinc reacts completely with exactly 100 cm3 of 1.00 mol dm–3 hydrochloric acid. 3 A 13.08 g sample of zinc reacts with an excess of hydrochloric acid to give 9.60 dm3 of hydrogen, measured at room conditions.

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2018

Q157 · A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W 9701/12 Oct/Nov 2018

35 A sample containing x mol of Al 2Cl 6 is dissolved in water to give solution W. In order to precipitate all of the aluminium as its hydroxide, y mol of sodium hydroxide are required. More of the alkali is added to re-dissolve the precipitate, giving solution Z. Which statements are correct? 1 the initial pH of solution W is below 7 2 y = 3x 3 Z contains x mol of aluminium

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2018

Q158 · A sample of the hydrocarbon C6H12 is completely burned in dry oxygen and the product… 9701/13 Oct/Nov 2018

3 A sample of the hydrocarbon C6H12 is completely burned in dry oxygen and the product gases are collected as shown. product gases, H2O + CO2 + excess of O2 excess of O2 P Q anhydrous soda lime calcium chloride (to absorb CO2) (to absorb H2O) The increases in mass of the collecting vessels P and Q are MP and MQ, respectively. What is the ratio MP / MQ? A 0.41 B 0.82 C 1.2 D 2.4

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2018

Q159 · 5.0 g samples of the carbonates of barium, copper, lithium and magnesium are decomposed… 9701/13 Oct/Nov 2018

4 5.0 g samples of the carbonates of barium, copper, lithium and magnesium are decomposed to the metal oxides and carbon dioxide. For which compound is there the greatest loss in mass? A barium carbonate B copper(II) carbonate C lithium carbonate D magnesium carbonate

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2018

Q160 · A butane burner is used to heat water 9701/13 Oct/Nov 2018

6 A butane burner is used to heat water. The Mr of butane is 58. ● of butane is –2877 kJ mol–1. ● 250 g of water is heated from 12 °C to 100 °C. ● The burner transfers 47% of the heat released from the burning fuel to the water. Assume that the butane undergoes complete combustion and none of the water evaporates. What is the minimum mass of butane that must be burnt? A 0.068 g B 1.85 g C 3.94 g D 4.48 g

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2018

Q161 · 0.200 mol of sulfur dioxide and 0.200 mol of oxygen are placed in a 1.00 dm3 sealed… 9701/13 Oct/Nov 2018

10 0.200 mol of sulfur dioxide and 0.200 mol of oxygen are placed in a 1.00 dm3 sealed container. The gases are allowed to react until equilibrium is reached. 2SO2 + O2 2SO3 At equilibrium there is 0.100 mol of SO3 in the container. What is the value of Kc? A 0.150 mol dm–3 B 0.800 mol dm–3 C 1.25 mol–1 dm3 D 6.67 mol–1 dm3

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2018

Q162 · An organic molecule W contains 3 carbon atoms 9701/13 Oct/Nov 2018

24 An organic molecule W contains 3 carbon atoms. It requires 4.5 molecules of oxygen for complete combustion. What could W be? A propane B propanoic acid C propanone D propan-1-ol

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2018

Q163 · A 3.7 g sample of copper(II) carbonate is added to 25 cm3 of 2.0 mol dm–3 hydrochloric… 9701/12 Feb/March 2019

2 A 3.7 g sample of copper(II) carbonate is added to 25 cm3 of 2.0 mol dm–3 hydrochloric acid. Which volume of gas is produced under room conditions? A 0.60 dm3 B 0.72 dm3 C 1.20 dm3 D 2.40 dm3

1 marks

Answer: A

This question in 9701/12 Feb/March 2019

Q164 · Acidified potassium manganate(VII) reacts with iron(II) ethanedioate, FeC2O4 9701/12 Feb/March 2019

10 Acidified potassium manganate(VII) reacts with iron(II) ethanedioate, FeC2O4. The reactions taking place are shown. MnO4 – + 8H+ + 5e– → Mn2+ + 4H2O Fe2+ → Fe3+ + e– C2O4 2– → 2CO2 + 2e– How many moles of iron(II) ethanedioate react with one mole of potassium manganate(VII)? A 0.60 B 1.67 C 2.50 D 5.00

1 marks

Answer: B

This question in 9701/12 Feb/March 2019

Q165 · When calcium nitrate thermally decomposes, oxygen is one of the products 9701/12 Feb/March 2019

15 When calcium nitrate thermally decomposes, oxygen is one of the products. Which volume of oxygen is produced under room conditions when 0.50 mol of calcium nitrate thermally decomposes? A 6.0 dm3 B 12.0 dm3 C 18.0 dm3 D 30.0 dm3

1 marks

Answer: A

This question in 9701/12 Feb/March 2019

Q166 · In an experiment, 10 cm3 of an organic compound, J, in the gaseous state is reacted with… 9701/12 Feb/March 2019

31 In an experiment, 10 cm3 of an organic compound, J, in the gaseous state is reacted with an excess of oxygen. Steam, 20 cm3 of carbon dioxide and 5 cm3 of nitrogen are the only products. All gas volumes were measured at the same temperature and pressure. What could be the identity of J? 1 C2H6N2 2 C2H3N 3 C2H7N

1 marks

Answer: C

This question in 9701/12 Feb/March 2019

Q167 · A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients 9701/11 May/June 2019

3 A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients. In a titration, a solution containing 1.00 g of this washing powder requires 7.15 cm3 of 0.100 mol dm–3 sulfuric acid for complete reaction. The sodium hydrogencarbonate is the only ingredient that reacts with the acid. What is the percentage by mass of sodium hydrogencarbonate in the washing powder? A 3.0% B 6.0% C 12.0% D 24.0%

1 marks

Answer: C

This question in 9701/11 May/June 2019

Q168 · When an evacuated tube of volume 400 cm3 is filled with gas at 300 K and 101 kPa, the… 9701/11 May/June 2019

6 When an evacuated tube of volume 400 cm3 is filled with gas at 300 K and 101 kPa, the mass of the tube increases by 0.65 g. Assume the gas behaves as an ideal gas. What could be the identity of the gas? A argon B helium C krypton D neon

1 marks

Answer: A

This question in 9701/11 May/June 2019

Q169 · Ethanedioic acid, HO2CCO2H, can be oxidised by KMnO4 in dilute sulfuric acid 9701/11 May/June 2019

9 Ethanedioic acid, HO2CCO2H, can be oxidised by KMnO4 in dilute sulfuric acid. The products of this reaction are carbon dioxide, water, potassium sulfate and manganese(II) sulfate. In this reaction each ethanedioic acid molecule loses two electrons as it is oxidised. A half-equation for this process is shown. HO2CCO2H → 2CO2 + 2H+ + 2e– How many water molecules are produced when five ethanedioic acid molecules are oxidised by KMnO4 in dilute sulfuric acid? A 5 B 8 C 10 D 16

1 marks

Answer: B

This question in 9701/11 May/June 2019

Q170 · 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, under room… 9701/11 May/June 2019

12 1.15 g of a metallic element needs 300 cm3 of oxygen for complete reaction, under room conditions, to form an oxide which contains O2– ions. What could be the identity of this metallic element? A calcium B magnesium C potassium D sodium

1 marks

Answer: D

This question in 9701/11 May/June 2019

Q171 · The reaction of bromine with warm NaOH(aq) produces products with the same oxidation… 9701/11 May/June 2019

17 The reaction of bromine with warm NaOH(aq) produces products with the same oxidation numbers, in the same ratios, as the reaction of chlorine with hot NaOH(aq). In one reaction between bromine and warm NaOH(aq), 30.2 g of a product containing sodium, bromine and oxygen is produced. Which mass of NaOH has reacted? A 8.00 g B 10.2 g C 20.3 g D 48.0 g

1 marks

Answer: D

This question in 9701/11 May/June 2019

Q172 · X, Y and Z are all gases that behave ideally and react according to the equation shown 9701/12 May/June 2019

6 X, Y and Z are all gases that behave ideally and react according to the equation shown. X(g) + 2Y(g) → 2Z(g) When 3.0 mol of X and 3.0 mol of Y are placed inside a container with a volume of 1.0 dm3, they react to form the maximum amount of Z. The final temperature of the reaction vessel is 120 °C. What is the final pressure inside the reaction vessel? A 4.49 × 106 Pa B 9.80 × 106 Pa C 1.47 × 107 Pa D 1.96 × 107 Pa

1 marks

Answer: C

This question in 9701/12 May/June 2019

Q173 · Ethyl ethanoate undergoes the following reaction 9701/12 May/June 2019

10 Ethyl ethanoate undergoes the following reaction. CH3CO2C2H5 + H2O C2H5OH + CH3CO2H Kc = 0.27 Equal amounts of ethanoic acid and ethanol were mixed together and allowed to reach equilibrium. At equilibrium, the concentrations of both ethanoic acid and ethanol were 0.42 mol dm–3. What is the concentration of ethyl ethanoate at equilibrium? A 0.22 mol dm–3 B 0.65 mol dm–3 C 0.81 mol dm–3 D 1.54 mol dm–3

1 marks

Answer: C

This question in 9701/12 May/June 2019

Q174 · An excess of chlorine was bubbled into 100 cm3 of hot 6.0 mol dm–3 sodium hydroxide 9701/12 May/June 2019

17 An excess of chlorine was bubbled into 100 cm3 of hot 6.0 mol dm–3 sodium hydroxide. How many moles of sodium chloride would be produced in the reaction? A 0.3 B 0.5 C 0.6 D 1.2

1 marks

Answer: B

This question in 9701/12 May/June 2019

Q175 · In an organic synthesis, a 62% yield of product is achieved 9701/12 May/June 2019

39 In an organic synthesis, a 62% yield of product is achieved. Which conversions are consistent with this information? 1 74.00 g of butan-2-ol → 44.64 g of butanone 2 74.00 g of butan-1-ol → 54.56 g of butanoic acid 3 74.00 g of 2-methylpropan-1-ol → 54.56 g of 2-methylpropanoic acid

1 marks

Answer: A

This question in 9701/12 May/June 2019

Q176 · The volume of carbon dioxide collected by reacting 0.100 mol of magnesium carbonate with… 9701/13 May/June 2019

11 The volume of carbon dioxide collected by reacting 0.100 mol of magnesium carbonate with 50.0 cm3 of 1.00 mol dm–3 sulfuric acid is measured against time. The volume produced is plotted against time and the line labelled P on the graph is obtained. Q volume of CO2 / cm3 P 0 0 time / s The experiment is repeated using 0.100 mol of the same magnesium carbonate, and a different sample of acid. All other conditions remain the same. Plotting these results gives the line labelled Q. Which sample of acid could give the line labelled Q? A 100 cm3 of 0.500 mol dm–3 sulfuric acid B 100 cm3 of 1.00 mol dm–3 sulfuric acid C 200 cm3 of 0.500 mol dm–3 hydrochloric acid D 200 cm3 of 1.00 mol dm–3 hydrochloric acid

1 marks

Answer: D

This question in 9701/13 May/June 2019

Q177 · An aqueous solution of a calcium compound is treated with a mixture of dilute aqueous… 9701/13 May/June 2019

17 An aqueous solution of a calcium compound is treated with a mixture of dilute aqueous nitric acid and aqueous silver nitrate. The resulting white precipitate dissolves when dilute aqueous ammonia is added. What is the relative molecular mass, Mr, of the calcium compound? A 54.0 B 75.6 C 111.1 D 199.9

1 marks

Answer: C

This question in 9701/13 May/June 2019

Q178 · In a catalytic converter 5.6 g of carbon monoxide reacts with an excess of nitrogen… 9701/13 May/June 2019

19 In a catalytic converter 5.6 g of carbon monoxide reacts with an excess of nitrogen monoxide. What is produced in this reaction? A 2.4 g of C and 6.0 g of NO2 B 2.4 g of C and 9.2 g of NO2 C 8.8 g of CO2 and 1.4 g of N2 D 8.8 g of CO2 and 2.8 g of N2

1 marks

Answer: D

This question in 9701/13 May/June 2019

Q179 · A 5.00 g sample of an anhydrous Group 2 metal nitrate loses 3.29 g in mass when heated… 9701/11 Oct/Nov 2019

14 A 5.00 g sample of an anhydrous Group 2 metal nitrate loses 3.29 g in mass when heated strongly. Which metal is present? A magnesium B calcium C strontium D barium

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2019

Q180 · In this question it should be assumed that (NH4)2CO3.H2O(s) dissolves in water without… 9701/12 Oct/Nov 2019

2 In this question it should be assumed that (NH4)2CO3.H2O(s) dissolves in water without causing an increase in volume. Which mass of (NH4)2CO3.H2O(s) should be added to 800 cm3 of water to form a 0.100 mol dm–3 solution of NH4 + ions? A 4.56 g B 7.13 g C 9.12 g D 14.3 g

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2019

Q181 · What is the smallest amount of oxygen molecules needed for the complete combustion of… 9701/12 Oct/Nov 2019

25 What is the smallest amount of oxygen molecules needed for the complete combustion of 40.0 g of methanol? A 1.88 moles B 2.50 moles C 3.75 moles D 5.00 moles

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2019

Q182 · A 5.00 g sample of an anhydrous Group 2 metal nitrate loses 3.29 g in mass when heated… 9701/13 Oct/Nov 2019

14 A 5.00 g sample of an anhydrous Group 2 metal nitrate loses 3.29 g in mass when heated strongly. Which metal is present? A magnesium B calcium C strontium D barium

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2019

Q183 · Sodium azide, NaN3, decomposes as shown 9701/12 Feb/March 2020

7 Sodium azide, NaN3, decomposes as shown. 2NaN3 → 2Na + 3N2 Which volume of nitrogen, measured at room temperature and pressure, will be produced by the decomposition of 150 g of sodium azide? A 166 dm3 B 83 dm3 C 55 dm3 D 37 dm3

1 marks

Answer: B

This question in 9701/12 Feb/March 2020

Q184 · 10 cm3 of ethane is burned in 45 cm3 of oxygen at a pressure of 101 kPa and a temperature… 9701/11 May/June 2020

4 10 cm3 of ethane is burned in 45 cm3 of oxygen at a pressure of 101 kPa and a temperature of 200 °C. Complete combustion takes place. What is the total volume of gas present when the reaction is complete, measured under the same conditions? A 30 cm3 B 50 cm3 C 55 cm3 D 60 cm3

1 marks

Answer: D

This question in 9701/11 May/June 2020

Q185 · 6.90 g of an ammonium salt is heated with an excess of aqueous sodium hydroxide 9701/11 May/June 2020

13 6.90 g of an ammonium salt is heated with an excess of aqueous sodium hydroxide. The volume of ammonia produced, measured under room conditions, is 2.51 dm3. Which ammonium salt is used? A ammonium carbonate (Mr = 96.0) B ammonium chloride (Mr = 53.5) C ammonium nitrate (Mr = 80.0) D ammonium sulfate (Mr = 132.1)

1 marks

Answer: D

This question in 9701/11 May/June 2020

Q186 · 0.25 g of anhydrous magnesium nitrate is heated strongly until it completely decomposes 9701/11 May/June 2020

17 0.25 g of anhydrous magnesium nitrate is heated strongly until it completely decomposes. What is the total volume of gas produced, measured under room conditions? A 40 cm3 B 81 cm3 C 101 cm3 D 202 cm3

1 marks

Answer: C

This question in 9701/11 May/June 2020

Q187 · A copper ore contains 3.00% of copper carbonate, CuCO3, by mass 9701/12 May/June 2020

2 A copper ore contains 3.00% of copper carbonate, CuCO3, by mass. Which mass of copper would be obtained from 1 tonne of the ore? A 1.91 kg B 3.71 kg C 15.4 kg D 58.4 kg

1 marks

Answer: C

This question in 9701/12 May/June 2020

Q188 · In this question you should assume air contains 21% oxygen 9701/12 May/June 2020

6 In this question you should assume air contains 21% oxygen. What is the minimum volume of air required to ensure complete combustion of 10 cm3 of butane gas, under room conditions? A 14 cm3 B 27 cm3 C 65 cm3 D 310 cm3

1 marks

Answer: D

This question in 9701/12 May/June 2020

Q189 · Magnesium nitrate, Mg(NO3)2, decomposes when heated to give a white solid and a mixture… 9701/12 May/June 2020

13 Magnesium nitrate, Mg(NO3)2, decomposes when heated to give a white solid and a mixture of gases. One of the gases released is an oxide of nitrogen, X. 7.4 g of anhydrous magnesium nitrate is heated until no further reaction takes place. What mass of X is produced? A 1.5 g B 2.3 g C 3.0 g D 4.6 g

1 marks

Answer: D

This question in 9701/12 May/June 2020

Q190 · The ester ethyl methanoate is prepared in a school laboratory by reacting a carboxylic… 9701/13 May/June 2020

29 The ester ethyl methanoate is prepared in a school laboratory by reacting a carboxylic acid with an alcohol. During the reaction, only 50.0% of the alcohol is converted into the ester. Which mass of alcohol is needed to prepare 10.0 g of the ester? A 3.11 g B 8.65 g C 12.4 g D 32.2 g

1 marks

Answer: C

This question in 9701/13 May/June 2020

Q191 · Which contain one mole of the underlined substance under room conditions? 9701/13 May/June 2020

31 Which contain one mole of the underlined substance under room conditions? 1 a balloon containing 24.0 dm3 of helium 2 a block of calcium carbonate weighing 100.1 g 3 4000 cm3 of a 0.250 mol dm–3 solution of sulfuric acid

1 marks

Answer: A

This question in 9701/13 May/June 2020

Q192 · On complete combustion, a sample of X produces 44 g of carbon dioxide and 27 g of water 9701/13 May/June 2020

39 On complete combustion, a sample of X produces 44 g of carbon dioxide and 27 g of water. On complete combustion, a sample of Y produces 44 g of carbon dioxide and 18 g of water. On complete combustion, a sample of Z produces 22 g of carbon dioxide and 9 g of water. Which substances could be straight chain alkanes? 1 X 2 Y 3 Z

1 marks

Answer: D

This question in 9701/13 May/June 2020

Q193 · Strontium metal can be extracted from strontium oxide, SrO, by reduction with aluminium 9701/11 Oct/Nov 2020

2 Strontium metal can be extracted from strontium oxide, SrO, by reduction with aluminium. One of the possible reactions is shown. 6SrO + 2Al  3Sr + Sr3Al 2O6 What is the maximum mass of strontium metal that can be produced from the reduction of 100 g of strontium oxide using this reaction? A 41.3 g B 42.3 g C 84.6 g D 169.2 g

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2020

Q194 · In aqueous solution, sulfuric acid dissociates as shown 9701/11 Oct/Nov 2020

10 In aqueous solution, sulfuric acid dissociates as shown. H2SO4  HSO4 – + H+ This reaction goes to completion. HSO4 – SO4 2– + H+ This reaction reaches equilibrium with constant Kc. Analysis of a 2.00 mol dm–3 solution of H2SO4 found the HSO4 – concentration to be 1.988 mol dm–3. What is Kc? A 1.381  105 dm3 mol–1 B 82.34 dm3 mol–1 C 1.214  10–2 mol dm–3 D 7.244  10–5 mol dm–3

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2020

Q195 · The units of Kc for an equilibrium reaction are mol–1 dm3 9701/11 Oct/Nov 2020

33 The units of Kc for an equilibrium reaction are mol–1 dm3. What could be the equation for the equilibrium? 1 A(aq) + B(aq) C(s) + D(aq) 2 P(aq) + Q(aq) R(aq) 3 W(aq) + 2X(aq) Y(aq) + Z(aq)

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2020

Q196 · An ore of manganese contains 4% by mass of MnO2 and no other manganese compound 9701/12 Oct/Nov 2020

2 An ore of manganese contains 4% by mass of MnO2 and no other manganese compound. Which mass of manganese would be obtained from 1 tonne of this ore? A 25.3 kg B 40.0 kg C 63.3 kg D 632 kg

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2020

Q197 · A white powder is known to be a mixture of magnesium oxide and aluminium oxide 9701/12 Oct/Nov 2020

5 A white powder is known to be a mixture of magnesium oxide and aluminium oxide. 100 cm3 of 2 mol dm–3 NaOH(aq) is just enough to dissolve the aluminium oxide in x grams of the mixture. The reaction is shown. Al 2O3 + 2OH– + 3H2O → 2Al (OH)4 – 800 cm3 of 2 mol dm–3 HCl (aq) is just enough to dissolve all of the oxide in x grams of the mixture. The reactions are shown. Al 2O3 + 6H+ → 2Al 3+ + 3H2O MgO + 2H+ → Mg2+ + H2O How many moles of each oxide are present in x grams of the mixture? aluminium magnesium oxide oxide A 0.05 0.25 B 0.05 0.50 C 0.10 0.25 D 0.10 0.50

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2020

Q198 · Compound X is the oxide of a Period 3 element 9701/12 Oct/Nov 2020

19 Compound X is the oxide of a Period 3 element. Compound X reacts with water to give an acidic solution. A solution is prepared by reacting 0.100 g of compound X with an excess of water. This solution is neutralised by exactly 25.0 cm3 of 0.100 mol dm–3 sodium hydroxide solution. What could be the identity of compound X? A Al 2O3 B MgO C P4O10 D SO3

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2020

Q199 · Strontium metal can be extracted from strontium oxide, SrO, by reduction with aluminium 9701/13 Oct/Nov 2020

2 Strontium metal can be extracted from strontium oxide, SrO, by reduction with aluminium. One of the possible reactions is shown. 6SrO + 2Al  3Sr + Sr3Al 2O6 What is the maximum mass of strontium metal that can be produced from the reduction of 100 g of strontium oxide using this reaction? A 41.3 g B 42.3 g C 84.6 g D 169.2 g

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2020

Q200 · A solution contains 0.25 g of sulfur dioxide in 1.00 dm3 of water 9701/12 Feb/March 2021

6 A solution contains 0.25 g of sulfur dioxide in 1.00 dm3 of water. Which volume of sulfur dioxide, measured at 50 C and a pressure of 1  105 Pa, must be added to 1.00 dm3 of water to produce this solution? A 0.0162 cm3 B 0.105 cm3 C 16.2 cm3 D 105 cm3

1 marks

Answer: D

This question in 9701/12 Feb/March 2021

Q201 · A large excess of marble chips is reacted with 25 cm3 of 1.0 mol dm–3 hydrochloric acid… 9701/12 Feb/March 2021

10 A large excess of marble chips is reacted with 25 cm3 of 1.0 mol dm–3 hydrochloric acid at 40 C. How is the result different when the reaction is repeated with 60 cm3 of 0.5 mol dm–3 hydrochloric acid at 40 C? A The reaction is faster and more of the products are made when the reaction is complete. B The reaction is faster and less of the products are made when the reaction is complete. C The reaction is slower and more of the products are made when the reaction is complete. D The reaction is slower and less of the products are made when the reaction is complete.

1 marks

Answer: C

This question in 9701/12 Feb/March 2021

Q202 · What is the minimum mass of oxygen required to ensure the complete combustion of 12 dm3… 9701/11 May/June 2021

6 What is the minimum mass of oxygen required to ensure the complete combustion of 12 dm3 of propane measured under room conditions? A 60 g B 80 g C 120 g D 160 g

1 marks

Answer: B

This question in 9701/11 May/June 2021

Q203 · A sample of propane, C3H8, with a mass of 9.61 g is completely combusted in an excess of… 9701/13 May/June 2021

2 A sample of propane, C3H8, with a mass of 9.61 g is completely combusted in an excess of oxygen under room conditions. Which volume of carbon dioxide gas is produced? A 4.89 dm3 B 5.24 dm3 C 14.7 dm3 D 15.7 dm3

1 marks

Answer: D

This question in 9701/13 May/June 2021

Q204 · Copper dissolves in dilute nitric acid producing a blue solution of Cu(NO3)2, water and… 9701/13 May/June 2021

9 Copper dissolves in dilute nitric acid producing a blue solution of Cu(NO3)2, water and nitrogen(II) oxide as the only products. How many moles of acid react with three moles of copper in the balanced equation? A 2 B 4 C 6 D 8

1 marks

Answer: D

This question in 9701/13 May/June 2021

Q205 · A mixture of ethanol and methanol is burned in oxygen to produce 35 cm3 of CO2 and 55 cm3… 9701/13 May/June 2021

24 A mixture of ethanol and methanol is burned in oxygen to produce 35 cm3 of CO2 and 55 cm3 of H2O. Complete combustion occurs and the volumes of both products are measured at 101 kPa and 120 C. What is the molar ratio, ethanol : methanol, in the mixture? A 1 : 3 B 2 : 3 C 3 : 2 D 3 : 1

1 marks

Answer: D

This question in 9701/13 May/June 2021

Q206 · 2.0 g of ammonium nitrate, NH4NO3, decomposes to give 0.90 g of water and a single gas 9701/11 Oct/Nov 2021

2 2.0 g of ammonium nitrate, NH4NO3, decomposes to give 0.90 g of water and a single gas. What is the identity of the gas? A NO B NO2 C N2O D N2

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2021

Q207 · Anhydrous magnesium nitrate, Mg(NO3)2, decomposes when heated, giving a white solid and a… 9701/11 Oct/Nov 2021

15 Anhydrous magnesium nitrate, Mg(NO3)2, decomposes when heated, giving a white solid and a mixture of two gases, X and Y. Y is oxygen. What is the ratio mass of X released ? mass of Y released A 1 B 1 C 1 D 1 0 . 174 0 . 267 0 . 348 3 . 43

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2021

Q208 · Citric acid is found in lemon juice 9701/11 Oct/Nov 2021

28 Citric acid is found in lemon juice. citric acid HO2CCH2C(OH)(CO2H)CH2CO2H Which volume of 0.40 mol dm–3 sodium hydroxide solution is required to neutralise a solution containing 0.0050 mol of citric acid? A 12.5 cm3 B 25.0 cm3 C 37.5 cm3 D 50.0 cm3

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2021

Q209 · A 0.005 mol sample of anhydrous calcium carbonate is completely thermally decomposed to… 9701/12 Oct/Nov 2021

14 A 0.005 mol sample of anhydrous calcium carbonate is completely thermally decomposed to give 100 cm3 of gas. In a separate experiment carried out under the same conditions, a 0.005 mol sample of anhydrous calcium nitrate is completely thermally decomposed. The volume of gaseous products is measured. What total volume of gaseous products is produced from the calcium nitrate? A 50 cm3 B 100 cm3 C 200 cm3 D 250 cm3

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2021

Q210 · 2.0 g of ammonium nitrate, NH4NO3, decomposes to give 0.90 g of water and a single gas 9701/13 Oct/Nov 2021

2 2.0 g of ammonium nitrate, NH4NO3, decomposes to give 0.90 g of water and a single gas. What is the identity of the gas? A NO B NO2 C N2O D N2

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2021

Q211 · Which element requires the least number of moles of oxygen for the complete combustion of… 9701/13 Oct/Nov 2021

12 Which element requires the least number of moles of oxygen for the complete combustion of 1 mol of its atoms? A aluminium B magnesium C phosphorus D sodium

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2021

Q212 · Anhydrous magnesium nitrate, Mg(NO3)2, decomposes when heated, giving a white solid and a… 9701/13 Oct/Nov 2021

15 Anhydrous magnesium nitrate, Mg(NO3)2, decomposes when heated, giving a white solid and a mixture of two gases, X and Y. Y is oxygen. What is the ratio mass of X released ? mass of Y released A 1 B 1 C 1 D 1 0 . 174 0 . 267 0 . 348 3 . 43

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2021

Q213 · Citric acid is found in lemon juice 9701/13 Oct/Nov 2021

28 Citric acid is found in lemon juice. citric acid HO2CCH2C(OH)(CO2H)CH2CO2H Which volume of 0.40 mol dm–3 sodium hydroxide solution is required to neutralise a solution containing 0.0050 mol of citric acid? A 12.5 cm3 B 25.0 cm3 C 37.5 cm3 D 50.0 cm3

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2021

Q214 · ‘Black powder’ is a mixture of potassium nitrate, carbon and sulfur 9701/11 May/June 2022

7 ‘Black powder’ is a mixture of potassium nitrate, carbon and sulfur. The mixture reacts as shown. 4KNO3(s) + 7C(s) + S(s)  3CO2(g) + 3CO(g) + 2N2(g) + K2S(s) + K2CO3(s) A sealed tube containing black powder has a volume of 10.0 cm3. When all of the black powder reacts, the reaction causes a pressure of 2  106 Pa and a temperature of 2500 K. The volume of the K2CO3 and K2S produced can be ignored. How many moles of KNO3 are contained in the sealed tube? A 4.81  10–4 B 9.63  10–4 C 1.93  10–3 D 9.63  10–1

1 marks

Answer: A

This question in 9701/11 May/June 2022

Q215 · A student reacts 4 mol of ammonia with oxygen to produce an oxide of nitrogen and water… 9701/11 May/June 2022

11 A student reacts 4 mol of ammonia with oxygen to produce an oxide of nitrogen and water only. Each nitrogen atom increases its oxidation state by 5 in the reaction. How many moles of oxygen gas react with 4 mol of ammonia in this reaction? A 4 mol B 5 mol C 7 mol D 10 mol

1 marks

Answer: B

This question in 9701/11 May/June 2022

Q216 · A 3.0 g sample of Na2CO3 powder is stirred into 50 cm3 of 1.0 mol dm–3 HCl 9701/11 May/June 2022

16 A 3.0 g sample of Na2CO3 powder is stirred into 50 cm3 of 1.0 mol dm–3 HCl. The volume of CO2 produced is 600 cm3. Na2CO3(s) + 2HCl (aq)  2NaCl (aq) + CO2(g) + H2O(l) [Mr: Na2CO3, 106.0] Which volume of CO2 is produced if 1.0 g of Na2CO3 powder is stirred into 50 cm3 of 1.0 mol dm–3 HCl under the same conditions? A 600 cm3 B 452 cm3 C 226 cm3 D 200 cm3

1 marks

Answer: C

This question in 9701/11 May/June 2022

Q217 · A student reacts 0.100 mol of each of sodium, magnesium and phosphorus atoms separately… 9701/11 May/June 2022

19 A student reacts 0.100 mol of each of sodium, magnesium and phosphorus atoms separately with an excess of oxygen. Which rows are correct? mass of oxide oxide formed / g 1 sodium 3.10 2 magnesium 4.03 3 phosphorus 7.10 A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

1 marks

Answer: A

This question in 9701/11 May/June 2022

Q218 · In a catalytic converter, 5.6 g of carbon monoxide react with an excess of nitrogen… 9701/11 May/June 2022

24 In a catalytic converter, 5.6 g of carbon monoxide react with an excess of nitrogen monoxide. What is produced in this reaction? A 2.4 g of C and 6.0 g of NO2 B 2.4 g of C and 9.2 g of NO2 C 8.8 g of CO2 and 1.4 g of N2 D 8.8 g of CO2 and 2.8 g of N2

1 marks

Answer: D

This question in 9701/11 May/June 2022

Q219 · 17.6 g of pentan-1-ol is completely combusted 9701/11 May/June 2022

33 17.6 g of pentan-1-ol is completely combusted. Which volume of gaseous products is formed when measured at s.t.p.? A 22.4 dm3 B 24.0 dm3 C 49.3 dm3 D 52.8 dm3

1 marks

Answer: A

This question in 9701/11 May/June 2022

Q220 · Hydrogen and iodine can react reversibly to produce hydrogen iodide 9701/12 May/June 2022

14 Hydrogen and iodine can react reversibly to produce hydrogen iodide. The equation is shown. H2(g) + I2(g) 2HI(g) 4.00 mol of hydrogen gas and X mol of iodine vapour are mixed in a sealed container of volume 1.00 dm3 at a temperature of 460 K. The system is allowed to reach equilibrium. The equilibrium mixture contains 2.00 mol of hydrogen iodide. The equilibrium constant, Kc, for the reaction at 460 K is 4.0. What is the value of X? A 0.50 mol B 1.17 mol C 1.33 mol D 2.50 mol

1 marks

Answer: C

This question in 9701/12 May/June 2022

Q221 · Ethyl butanoate is a flavouring, with a fruity flavour 9701/12 May/June 2022

38 Ethyl butanoate is a flavouring, with a fruity flavour. Which row is correct? alcohol and acid that react the mass of water formed to form ethyl butanoate when 2.32 g of ester is formed O A and OH 0.36 g OH O B and OH 0.40 g OH O C and OH 0.36 g OH O D and OH 0.40 g OH

1 marks

Answer: A

This question in 9701/12 May/June 2022

Q222 · How many moles of oxygen, O2, are needed to burn 1 mol of ethane if the products of the… 9701/13 May/June 2022

4 How many moles of oxygen, O2, are needed to burn 1 mol of ethane if the products of the reaction are water and carbon only? A 1.5 B 3 C 3.5 D 5

1 marks

Answer: A

This question in 9701/13 May/June 2022

Q223 · A student reacts 1 mol of magnesium powder in a sealed 0.030 m3 container of oxygen at a… 9701/13 May/June 2022

8 A student reacts 1 mol of magnesium powder in a sealed 0.030 m3 container of oxygen at a pressure of 2.0  105 Pa and a temperature of 600 K. The magnesium reacts completely to form MgO. Which percentage of the oxygen will be used up? A 5.0% B 10% C 42% D 83%

1 marks

Answer: C

This question in 9701/13 May/June 2022

Q224 · A student adds 3 mol of acidified K2Cr2O7 to an excess of I– ions 9701/13 May/June 2022

12 A student adds 3 mol of acidified K2Cr2O7 to an excess of I– ions. The chromium is all reduced to Cr3+ and I– ions are oxidised to I2. The I2 released is reduced back to I– ions by X mol of S2O3 2– ions. 1 mol of I2 is reduced by 2 mol of S2O3 2– ions. What is the value of X? A 3 B 6 C 9 D 18

1 marks

Answer: D

This question in 9701/13 May/June 2022

Q225 · The reaction between sulfur dioxide and oxygen is reversible 9701/13 May/June 2022

14 The reaction between sulfur dioxide and oxygen is reversible. 2SO2(g) + O2(g) 2SO3(g) Kc = 280 mol–1 dm3 at 1000 K In an equilibrium mixture at 1000 K the sulfur trioxide concentration is 6.00 mol dm–3. The sulfur dioxide concentration is twice the oxygen concentration. What is the sulfur dioxide concentration? A 0.175 mol dm–3 B 0.252 mol dm–3 C 0.318 mol dm–3 D 0.636 mol dm–3

1 marks

Answer: D

This question in 9701/13 May/June 2022

Q226 · A 4.00 g sample of an anhydrous Group 2 metal nitrate, Z, is heated strongly until there… 9701/13 May/June 2022

21 A 4.00 g sample of an anhydrous Group 2 metal nitrate, Z, is heated strongly until there is no further change of mass. A solid residue of mass 1.37 g is formed. Which metal is present in Z? A barium B calcium C magnesium D strontium

1 marks

Answer: B

This question in 9701/13 May/June 2022

Q227 · Mixture R consists of one mole of C3H6 and one mole of C4H6 9701/11 Oct/Nov 2022

2 Mixture R consists of one mole of C3H6 and one mole of C4H6. What is the minimum number of moles of oxygen molecules needed for complete combustion of mixture R? A 6.5 B 7 C 10 D 20

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2022

Q228 · The carbonate of an s-block element is reacted with an excess of hydrochloric acid 9701/11 Oct/Nov 2022

8 The carbonate of an s-block element is reacted with an excess of hydrochloric acid. 0.833 g of the carbonate releases 200 cm3 of gas, measured under room conditions. What is the identity of the metal carbonate? A Na2CO3 B K2CO3 C MgCO3 D CaCO3

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2022

Q229 · A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of… 9701/11 Oct/Nov 2022

10 A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.350 mol dm–3 hydrochloric acid. The temperature increases by 2.5 °C. No heat is lost to the surroundings. The final mixture has a specific heat capacity of 4.2 J cm–3 K–1. What is the molar enthalpy change for the reaction? A –150 kJ mol–1 B –60 kJ mol–1 C –30 kJ mol–1 D –0.15 kJ mol–1

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2022

Q230 · Ethanol is produced industrially by reacting ethene and steam 9701/11 Oct/Nov 2022

14 Ethanol is produced industrially by reacting ethene and steam. C2H4(g) + H2O(g) C2H5OH(g) Kp has a value of 1.8 × 10–5 and the partial pressures of the reactants at equilibrium are shown. partial pressure reactant / kPa ethene 4.8 × 103 steam 2.8 × 103 Which row is correct? partial pressure of ethanol at units of Kp equilibrium / kPa A 2.42 × 102 kPa–1 B 2.42 × 102 kPa C 7.47 × 1011 kPa–1 D 7.47 × 1011 kPa

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2022

Q231 · Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the… 9701/11 Oct/Nov 2022

22 Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the reaction is complete. 6NaOH(aq) + xCl 2(aq) → yNaCl (aq) + zNaCl O3(aq) + 3H2O(l) Which row is correct? [Na+](aq) after x reaction / mol dm–3 A 3 4.0 B 3 less than 4.0 C 6 4.0 D 6 less than 4.0

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2022

Q232 · Sodium peroxide, Na2O2, is used to absorb carbon dioxide from the atmosphere and release… 9701/12 Oct/Nov 2022

2 Sodium peroxide, Na2O2, is used to absorb carbon dioxide from the atmosphere and release oxygen in closed environments such as space capsules and submarines. 2Na2O2 + 2CO2  2Na2CO3 + O2 Which mass of sodium peroxide would be required to remove 2.4 dm3 of carbon dioxide from the atmosphere at room temperature and pressure? A 2.4 g B 3.9 g C 7.8 g D 15.6 g

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2022

Q233 · Calcium oxide and magnesium sulfide each react with acid 9701/12 Oct/Nov 2022

4 Calcium oxide and magnesium sulfide each react with acid. CaO(s) + 2H+(aq)  Ca2+(aq) + H2O(l) MgS(s) + 2H+(aq)  Mg2+(aq) + H2S(g) A mixture of these two compounds, X, reacts with exactly 0.125 mol of dilute hydrochloric acid. The amount of hydrogen sulfide formed is 0.0250 mol. What was the mass of calcium oxide in mixture X? A 1.4 g B 2.1 g C 2.8 g D 4.2 g

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2022

Q234 · The nitrates of beryllium, calcium, magnesium and strontium all decompose in the same way… 9701/12 Oct/Nov 2022

19 The nitrates of beryllium, calcium, magnesium and strontium all decompose in the same way when heated. When 2.00 g of one of these anhydrous nitrates is decomposed, 1.32 g of gas is produced. What is the nitrate? A beryllium nitrate B calcium nitrate C magnesium nitrate D strontium nitrate

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2022

Q235 · Mixture R consists of one mole of C3H6 and one mole of C4H6 9701/13 Oct/Nov 2022

2 Mixture R consists of one mole of C3H6 and one mole of C4H6. What is the minimum number of moles of oxygen molecules needed for complete combustion of mixture R? A 6.5 B 7 C 10 D 20

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2022

Q236 · The carbonate of an s-block element is reacted with an excess of hydrochloric acid 9701/13 Oct/Nov 2022

8 The carbonate of an s-block element is reacted with an excess of hydrochloric acid. 0.833 g of the carbonate releases 200 cm3 of gas, measured under room conditions. What is the identity of the metal carbonate? A Na2CO3 B K2CO3 C MgCO3 D CaCO3

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2022

Q237 · A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of… 9701/13 Oct/Nov 2022

10 A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.350 mol dm–3 hydrochloric acid. The temperature increases by 2.5 C. No heat is lost to the surroundings. The final mixture has a specific heat capacity of 4.2 J cm–3 K–1. What is the molar enthalpy change for the reaction? A –150 kJ mol–1 B –60 kJ mol–1 C –30 kJ mol–1 D –0.15 kJ mol–1

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2022

Q238 · Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the… 9701/13 Oct/Nov 2022

22 Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the reaction is complete. 6NaOH(aq) + xCl 2(aq)  yNaCl (aq) + zNaCl O3(aq) + 3H2O(l) Which row is correct? [Na+](aq) after x reaction / mol dm–3 A 3 4.0 B 3 less than 4.0 C 6 4.0 D 6 less than 4.0

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2022

Q239 · A sample containing 0.010mol of anhydrous calcium nitrate is heated strongly until it… 9701/12 Feb/March 2023

21 A sample containing 0.010mol of anhydrous calcium nitrate is heated strongly until it fully decomposes. All the gas produced is collected and its volume measured at room conditions. What is the volume of gas produced? A 120cm3 B 600cm3 C 720cm3 D 840cm3

1 marks

Answer: B

This question in 9701/12 Feb/March 2023

Q240 · An aqueous solution contains 4.00g of a carboxylic acid, Q 9701/12 Feb/March 2023

37 An aqueous solution contains 4.00g of a carboxylic acid, Q. When this solution reacts with an excess of magnesium, 380cm3 of gas is produced, measured at s.t.p. What is the relative formula mass of Q? A 59 B 118 C 126 D 236

1 marks

Answer: B

This question in 9701/12 Feb/March 2023

Q241 · A piece of rock has a mass of 2.00g 9701/13 May/June 2023

3 A piece of rock has a mass of 2.00g. It contains calcium carbonate, but no other basic substances. It neutralises exactly 36.0cm3 of 0.500moldm–3 hydrochloric acid. What is the percentage by mass of calcium carbonate in the 2.00g piece of rock? A 22.5% B 45.0% C 72.0% D 90.1%

1 marks

Answer: B

This question in 9701/13 May/June 2023

Q242 · This amount of oxygen gas has a volume of 6.00cm3 when measured at 1.00 × 105Pa and 35°C 9701/13 May/June 2023

8 This amount of oxygen gas has a volume of 6.00cm3 when measured at 1.00 × 105Pa and 35°C. What is the concentration of oxygen gas in the water? (You should assume that oxygen behaves as an ideal gas.) A 2.34 × 10−4moldm−3 B 1.17 × 10−3moldm−3 C 1.25 × 10−3moldm−3 D 1.03 × 10−2moldm−2

1 marks

Answer: B

This question in 9701/13 May/June 2023

Q243 · Which mixture will react to form exactly one mole of water? 9701/13 May/June 2023

11 Which mixture will react to form exactly one mole of water? volume 2.00moldm–3 volume 1.00moldm–3 H2SO4/cm3 NaOH/cm3 A 250 500 B 250 1000 C 500 500 D 500 1000

1 marks

Answer: B

This question in 9701/13 May/June 2023

Q244 · The enthalpy change for neutralisation of HNO3(aq) with NaOH(aq) is –57.0kJmol–1 9701/13 May/June 2023

12 The enthalpy change for neutralisation of HNO3(aq) with NaOH(aq) is –57.0kJmol–1. In an experiment, 20.0cm3 of 4.00moldm–3 HNO3 is mixed with 30.0cm3 of 2.00moldm–3 NaOH in an insulated container. The initial temperature of both solutions is 25.0 °C. It can be assumed that the heat capacity of the product mixture is 4.2Jcm–3°C–1 and that there are no heat losses. What is the maximum final temperature of the mixture? A 41.3°C B 44.0°C C 46.7°C D 52.1°C

1 marks

Answer: A

This question in 9701/13 May/June 2023

Q245 · A sample of 35.6g of hydrated sodium carbonate contains 25.84% sodium ions by mass 9701/11 Oct/Nov 2023

4 A sample of 35.6g of hydrated sodium carbonate contains 25.84% sodium ions by mass. When this sample is heated, anhydrous sodium carbonate and water are formed. Which mass of water is given off? A 7.2g B 10.6g C 14.4g D 21.2g

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2023

Q246 · When an equimolar mixture of H2 and I2 react, the mole fraction of HI in the final… 9701/11 Oct/Nov 2023

13 When an equimolar mixture of H2 and I2 react, the mole fraction of HI in the final mixture is x. What is the equilibrium constant, Kp, for the reaction? A B C D

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2023

Q247 · In reaction 1, a student measures the initial rate of production of CO2(g) when CuCO3(s)… 9701/11 Oct/Nov 2023

14 In reaction 1, a student measures the initial rate of production of CO2(g) when CuCO3(s) is added to 50cm3 of 0.1moldm−3 HNO3(aq). In reaction 2, the student repeats the experiment using 50cm3 of 0.5moldm−3 HNO3(aq) and the same mass of CuCO3(s). In reaction 1 and reaction 2, the acid is in excess and samples of the same CuCO3 powder are used. Which row is correct? A greater than 1 greater than 1 B greater than 1 less than 1 C less than 1 greater than 1 D less than 1 less than 1

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2023

Q248 · A 5.00g sample of an anhydrous Group 2 metal nitrate loses 3.29g in mass when heated… 9701/11 Oct/Nov 2023

21 A 5.00g sample of an anhydrous Group 2 metal nitrate loses 3.29g in mass when heated strongly. Which metal is present? A magnesium B calcium C strontium D barium

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2023

Q249 · Zinc reacts with concentrated nitric acid giving three products only: zinc nitrate, an… 9701/12 Oct/Nov 2023

3 Zinc reacts with concentrated nitric acid giving three products only: zinc nitrate, an oxide of nitrogen and water. 3.0 moles of zinc react with 8.0 moles of nitric acid. Zinc nitrate contains Zn2+ ions. What could be the formula of the oxide of nitrogen? A N2O B NO C N2O3 D NO2 A 3.7g sample of copper(II) carbonate is added to 25cm3 of 2.0moldm–3 hydrochloric acid.

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2023

Q250 · Which volume of gas is produced at room conditions? 9701/12 Oct/Nov 2023

4 Which volume of gas is produced at room conditions? A 0.60dm3 B 0.72dm3 C 1.20dm3 D 2.40dm3

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2023

Question 251 9701/12 Oct/Nov 2023

8 room conditions. What is the final volume of gas, measured at room conditions? A 7.20dm3 B 8.40dm3 C 16.80dm3 D 18.00dm3

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2023

Q252 · A mixture of the three gases, oxygen, nitrogen and argon, is at a total pressure of 500kPa 9701/12 Oct/Nov 2023

14 A mixture of the three gases, oxygen, nitrogen and argon, is at a total pressure of 500kPa. There is a total of 1.2 moles of gas in the mixture. If the oxygen gas alone occupied the entire volume of the mixture, it would exert a pressure of 150kPa. At room conditions the amount of nitrogen gas in the mixture would occupy a volume of 5.76dm3. What is the partial pressure of the argon gas in the mixture? A 150kPa B 200kPa C 250kPa D 300kPa 0.200mol of sulfur dioxide and 0.200mol of oxygen are placed in a 1.00dm3 sealed container. The

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2023

Q253 · Gases are allowed to react until equilibrium is reached 9701/12 Oct/Nov 2023

15 gases are allowed to react until equilibrium is reached. 2SO2 + O2 ⇋2SO3 At equilibrium there is 0.100mol of SO3 in the container. What is the value of Kc? A 0.150moldm–3 B 0.800moldm–3 C 1.25mol–1dm3 D 6.67mol–1dm3

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2023

Q254 · A sample of 35.6g of hydrated sodium carbonate contains 25.84% sodium ions by mass 9701/13 Oct/Nov 2023

4 A sample of 35.6g of hydrated sodium carbonate contains 25.84% sodium ions by mass. When this sample is heated, anhydrous sodium carbonate and water are formed. Which mass of water is given off? A 7.2g B 10.6g C 14.4g D 21.2g

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2023

Q255 · A 5.00g sample of an anhydrous Group 2 metal nitrate loses 3.29g in mass when heated… 9701/13 Oct/Nov 2023

21 A 5.00g sample of an anhydrous Group 2 metal nitrate loses 3.29g in mass when heated strongly. Which metal is present? A magnesium B calcium C strontium D barium

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2023

Q256 · What is the maximum volume of sulfur dioxide gas measured at room conditions produced… 9701/12 Feb/March 2024

4 What is the maximum volume of sulfur dioxide gas measured at room conditions produced from burning 100 dm3 of diesel fuel containing 0.8346 g of sulfur? A 291 cm3 B 312 cm3 C 582 cm3 D 624 cm3

1 marks

Answer: D

This question in 9701/12 Feb/March 2024

Q257 · KMnO4 is an oxidising agent 9701/12 Feb/March 2024

12 KMnO4 is an oxidising agent. Its reaction with Fe2+ is shown in the following ionic equation. ...X...MnO4 – + … Fe2+ + … H+  … Mn2+ + ...Y...Fe3+ + … H2O What are X and Y when the equation is balanced? X Y A 1 1 B 1 3 C 1 5 D 5 1

1 marks

Answer: C

This question in 9701/12 Feb/March 2024

Q258 · How many moles of oxygen gas are needed for the complete combustion of 1 mol of (CH3)3COH? 9701/12 Feb/March 2024

32 How many moles of oxygen gas are needed for the complete combustion of 1 mol of (CH3)3COH? A 6 B 6.5 C 12 D 13

1 marks

Answer: A

This question in 9701/12 Feb/March 2024

Q259 · Sample X is added to water and made up to a total volume of 200 cm3 9701/11 May/June 2024

1 Sample X is added to water and made up to a total volume of 200 cm3. This gives a solution of 0.100 mol dm–3 HCl. What is X? A 10 cm3 of 1.00 mol dm–3 HCl B 30 cm3 of 0.90 mol dm–3 HCl C 50 cm3 of 0.40 mol dm–3 HCl D 100 cm3 of 0.30 mol dm–3 HCl

1 marks

Answer: C

This question in 9701/11 May/June 2024

Q260 · A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen 9701/11 May/June 2024

2 A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen. After cooling, the residual gas was passed through aqueous potassium hydroxide. All gas volumes were measured at the same temperature and pressure. Which volume of gas was absorbed by the alkali? A 15 cm3 B 20 cm3 C 30 cm3 D 40 cm3

1 marks

Answer: C

This question in 9701/11 May/June 2024

Q261 · Oxygen can be prepared by the reaction of potassium manganate(VII), KMnO4, hydrogen… 9701/11 May/June 2024

12 Oxygen can be prepared by the reaction of potassium manganate(VII), KMnO4, hydrogen peroxide, H2O2, and sulfuric acid, H2SO4. Each H2O2 molecule loses two electrons in this reaction. The other products of the reaction are potassium sulfate, manganese(II) sulfate and water. How many moles of oxygen gas are produced when 1.0 mol of KMnO4 reacts with an excess of H2O2 in acidic conditions? A 2.0 mol B 2.5 mol C 4.5 mol D 5.0 mol

1 marks

Answer: B

This question in 9701/11 May/June 2024

Q262 · What is the total volume of gas produced, measured at room conditions, when 0.010 mol of… 9701/11 May/June 2024

20 What is the total volume of gas produced, measured at room conditions, when 0.010 mol of anhydrous magnesium nitrate is completely decomposed by heating? A 240 cm3 B 480 cm3 C 600 cm3 D 720 cm3

1 marks

Answer: C

This question in 9701/11 May/June 2024

Q263 · The molecule of limonene, C10H16, contains a 6-membered ring 9701/12 May/June 2024

34 The molecule of limonene, C10H16, contains a 6-membered ring. This is the only cyclic component in its structure. Which volume of hydrogen, at room conditions, is required to react completely with the C=C double bonds in one mole of limonene? A 12 dm3 B 24 dm3 C 48 dm3 D 72 dm3

1 marks

Answer: C

This question in 9701/12 May/June 2024

Q264 · X is an impure sample of a Group 2 metal carbonate, MCO3 9701/13 May/June 2024

1 X is an impure sample of a Group 2 metal carbonate, MCO3. X contains 57% by mass of MCO3. The impurities in X do not react with hydrochloric acid. 7.4 g of X is reacted with an excess of dilute hydrochloric acid. 0.050 mol of the Group 2 metal chloride is produced. What is the identity of the Group 2 metal? A Mg B Ca C Sr D Ba

1 marks

Answer: A

This question in 9701/13 May/June 2024

Q265 · The apparatus used to determine a value for the enthalpy of combustion of butan-1-ol is… 9701/13 May/June 2024

9 The apparatus used to determine a value for the enthalpy of combustion of butan-1-ol is shown. The mass of 1.00 cm3 of water is 1.00 g. thermometer copper can 175 cm3 water butan-1-ol in burner initial mass of burner + butan-1-ol 58.34 g initial temperature of water 17.6 C final mass of burner + butan-1-ol 57.85 g final temperature of water 41.1 C butan-1-ol Mr = 74 Which value, to three significant figures, for the enthalpy of combustion of butan-1-ol can be calculated from these data? A –114 J mol–1 B –17.2 kJ mol–1 C –2600 kJ mol–1 D –4540 kJ mol–1

1 marks

Answer: C

This question in 9701/13 May/June 2024

Q266 · W moles of HNO2 undergoes a disproportionation reaction to produce U moles of HNO3 and V… 9701/13 May/June 2024

13 W moles of HNO2 undergoes a disproportionation reaction to produce U moles of HNO3 and V moles of NO. ● No other nitrogen containing product is produced. ● Nitrogen is the only element oxidised or reduced. What are the values of W, U and V? W U V A 2 1 1 B 3 1 2 C 5 3 2 D 5 1 4

1 marks

Answer: B

This question in 9701/13 May/June 2024

Q267 · Gas X dissociates on heating to set up the following equilibrium 9701/13 May/June 2024

14 Gas X dissociates on heating to set up the following equilibrium. X(g) Y(g) + Z(g) A quantity of gas X is heated at constant pressure, p, at a certain temperature. The equilibrium partial pressure of gas X is found to be 1 p . 7 What is the equilibrium constant, Kp, at this temperature? A 6 p B 9 p C 36 p D 9p 7 7 7

1 marks

Answer: B

This question in 9701/13 May/June 2024

Q268 · A sample consisting of 1.0 mol of anhydrous calcium nitrate is completely decomposed by… 9701/13 May/June 2024

19 A sample consisting of 1.0 mol of anhydrous calcium nitrate is completely decomposed by strong heating. What is the total amount of gas produced in this reaction? A 1.0 mol B 2.0 mol C 2.5 mol D 3.0 mol

1 marks

Answer: C

This question in 9701/13 May/June 2024

Q269 · What is produced when 60 g of nitrogen monoxide reacts with an excess of carbon monoxide… 9701/13 May/June 2024

24 What is produced when 60 g of nitrogen monoxide reacts with an excess of carbon monoxide in a catalytic converter? A 12 g of carbon and 92 g of nitrogen dioxide B 24 g of carbon and 92 g of nitrogen dioxide C 88 g of carbon dioxide and 28 g of nitrogen D 88 g of carbon dioxide and 56 g of nitrogen

1 marks

Answer: C

This question in 9701/13 May/June 2024

Q270 · A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous NaOH 9701/13 May/June 2024

36 A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous NaOH. The two organic products of the hydrolysis are separated, purified and weighed. Out of the total mass of products obtained, what is the percentage by mass of each product? A 32.4% and 67.6% B 38.3% and 61.7% C 42.3% and 57.7% D 50.0% and 50.0%

1 marks

Answer: C

This question in 9701/13 May/June 2024

Q271 · Compound X has the following properties 9701/13 May/June 2024

39 Compound X has the following properties. ● When 0.20 mol of X undergoes complete combustion, 14.4 dm3 of carbon dioxide is produced, measured under room conditions. ● X reacts with 2,4-dinitrophenylhydrazine reagent to give an orange crystalline product. ● X does not give a yellow precipitate with alkaline I2(aq). What could be X? A hexan-3-one B propanal C propan-1-ol D propanone

1 marks

Answer: B

This question in 9701/13 May/June 2024

Q272 · When 0.20 mol of hydrogen gas and 0.15 mol of iodine gas are heated at 723 K until… 9701/11 Oct/Nov 2024

13 When 0.20 mol of hydrogen gas and 0.15 mol of iodine gas are heated at 723 K until equilibrium is established, the equilibrium mixture contains 0.26 mol of hydrogen iodide. The equation for the reaction is as follows. H2(g) + I2(g) 2HI(g) What is the correct expression for the equilibrium constant Kc? 2  0.26 (2  0.26) 2 (0.26)2 (0.26)2 A B C D 0.20  0.15 0.20  0.15 0.07  0.02 0.13  0.13

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2024

Q273 · 7.5 g of nitrogen monoxide reacts with 7.0 g of carbon monoxide on the surface of the… 9701/11 Oct/Nov 2024

23 7.5 g of nitrogen monoxide reacts with 7.0 g of carbon monoxide on the surface of the catalytic converter in the exhaust system of a car. What is the total volume of the product gases measured at room conditions? A 3.0 dm3 B 6.0 dm3 C 9.0 dm3 D 12.0 dm3

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2024

Q274 · The structure of limonene is shown 9701/11 Oct/Nov 2024

30 The structure of limonene is shown. limonene What are the number of moles of carbon dioxide and water produced when a sample of limonene is completely combusted in oxygen? number of moles number of moles of carbon dioxide of water A 4 3 B 5 4 C 5 8 D 9 7

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2024

Q275 · A 0.216 g sample of aluminium carbide reacts with an excess of water to produce methane… 9701/12 Oct/Nov 2024

3 A 0.216 g sample of aluminium carbide reacts with an excess of water to produce methane gas. This is the only carbon-containing product formed in the reaction. This methane gas burns completely in O2 to form H2O and CO2 only. The volume of CO2 produced at room temperature and pressure is 108 cm3. What is the formula of aluminium carbide? A Al 2C3 B Al 3C2 C Al 3C4 D Al 4C3

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2024

Q276 · A sample of propanoic acid of mass 3.70 g reacts with an excess of magnesium 9701/12 Oct/Nov 2024

37 A sample of propanoic acid of mass 3.70 g reacts with an excess of magnesium. A second sample of propanoic acid of mass 3.70 g reacts with an excess of sodium. Both reactions go to completion forming a gas. Which row is correct? volume of gas formed volume of gas formed with magnesium with sodium at s.t.p. / cm3 at s.t.p. / cm3 A 560 560 B 560 1120 C 1120 560 D 1120 1120

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2024

Q277 · 7.5 g of nitrogen monoxide reacts with 7.0 g of carbon monoxide on the surface of the… 9701/13 Oct/Nov 2024

23 7.5 g of nitrogen monoxide reacts with 7.0 g of carbon monoxide on the surface of the catalytic converter in the exhaust system of a car. What is the total volume of the product gases measured at room conditions? A 3.0 dm3 B 6.0 dm3 C 9.0 dm3 D 12.0 dm3

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2024

Q278 · The structure of limonene is shown 9701/13 Oct/Nov 2024

30 The structure of limonene is shown. limonene What are the number of moles of carbon dioxide and water produced when a sample of limonene is completely combusted in oxygen? number of moles number of moles of carbon dioxide of water A 4 3 B 5 4 C 5 8 D 9 7

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2024

Q279 · Crystals of copper(II) nitrate are prepared by adding an excess of malachite to nitric… 9701/12 Feb/March 2025

2 Crystals of copper(II) nitrate are prepared by adding an excess of malachite to nitric acid. The formula of malachite is Cu(OH)2•CuCO3. (Mr = 221.0) 12.0 g of malachite is added to 30.0 cm3 of 1.50 mol dm–3 nitric acid. Which mass of malachite is left unreacted when the reaction is complete? A 2.05 g B 2.49 g C 7.03 g D 9.51 g

1 marks

Answer: D

This question in 9701/12 Feb/March 2025

Q280 · An excess of zinc reacts with x cm3 of 2.00 mol dm–3 hydrochloric acid 9701/12 Feb/March 2025

8 An excess of zinc reacts with x cm3 of 2.00 mol dm–3 hydrochloric acid. The gas produced is dried and collected. The gas occupies 1.534 dm3 at 101 000 Pa and 293 K. The gas produced behaves as an ideal gas. What is the value of x? A 31.8 cm3 B 34.7 cm3 C 63.6 cm3 D 69.4 cm3

1 marks

Answer: C

This question in 9701/12 Feb/March 2025

Q281 · A student mixes 25.0 cm3 of 0.100 mol dm–3 sodium hydroxide solution with 25.0 cm3 of… 9701/12 Feb/March 2025

12 A student mixes 25.0 cm3 of 0.100 mol dm–3 sodium hydroxide solution with 25.0 cm3 of 0.100 mol dm–3 hydrochloric acid and the student records a temperature rise of 2.50 °C. What is the enthalpy change of the reaction per mole of NaOH? A –209 kJ mol–1 B –104.5 kJ mol–1 C –209 J mol–1 D –522.5 J mol–1

1 marks

Answer: A

This question in 9701/12 Feb/March 2025

Q282 · Two nitrates decompose on heating according to the equations shown 9701/12 Feb/March 2025

25 Two nitrates decompose on heating according to the equations shown. 2Pb(NO3)2(s)  2PbO(s) + 4NO2(g) + O2(g) 2NH4NO3(s)  2N2(g) + O2(g) + 4H2O(l) One mole of each nitrate is heated separately. The gas produced in each reaction is bubbled through NaOH(aq). The volume of any gas that does not react with NaOH(aq) is then collected and measured. Which nitrate: ● shows the greater percentage loss in mass ● produces the greater volume of gas collected? greater percentage greater volume loss of mass of gas collected A NH4NO3 NH4NO3 B NH4NO3 Pb(NO3)2 C Pb(NO3)2 NH4NO3 D Pb(NO3)2 Pb(NO3)2

1 marks

Answer: A

This question in 9701/12 Feb/March 2025

Q283 · 50cm3 of 1.0moldm–3 H2SO4 is added to 100cm3 of 1.0moldm–3 NaOH in an insulated vessel 9701/11 May/June 2025

11 50cm3 of 1.0moldm–3 H2SO4 is added to 100cm3 of 1.0moldm–3 NaOH in an insulated vessel. Both solutions are at a temperature of 20°C before mixing. After mixing, the temperature rises and the highest temperature reached is 29°C. Assume that: ● all the energy released in the reaction goes into raising the temperature of the aqueous reaction mixture ● the specific heat capacity of the mixture is 4.2Jcm–3 K–1. What is the value of the enthalpy of neutralisation determined from this experiment? A –113.4kJmol–1 B –56.7kJmol–1 C –37.8kJmol–1 D –18.9kJmol–1

1 marks

Answer: B

This question in 9701/11 May/June 2025

Q284 · Barium dithionate, BaS2O6•2H2O, is soluble in water 9701/11 May/June 2025

12 Barium dithionate, BaS2O6•2H2O, is soluble in water. S2O6 2– ions slowly decompose in acidic solution. S2O6 2–(aq)  SO2(g) + SO4 2–(aq) 3.513g of BaS2O6•2H2O is dissolved in water in a 100cm3 volumetric flask and the solution made up to the mark with HCl(aq). At time xmin, a white precipitate of mass 0.661g is present in the flask. What is the concentration of BaS2O6 in the volumetric flask at time xmin? A 0.0077moldm–3 B 0.0090moldm–3 C 0.077moldm–3 D 0.090moldm–3

1 marks

Answer: C

This question in 9701/11 May/June 2025

Q285 · Two reactions are described 9701/11 May/June 2025

35 Two reactions are described. 1 2-bromo-2-methylbutane heated with NaOH(aq) 2 2-chloro-2-methylbutane heated with NaOH(aq) In both reactions, the conditions are the same and NaOH(aq) is in excess. 30.18g of 2-bromo-2-methylbutane forms 12.32g of product X. [Mr: 2-bromo-2-methylbutane, 150.9; 2-chloro-2-methylbutane, 106.5] Which row is correct? percentage yield of product X/% relative rate of reaction A 41 1 is faster than 2 B 41 2 is faster than 1 C 70 1 is faster than 2 D 70 2 is faster than 1

1 marks

Answer: C

This question in 9701/11 May/June 2025

Q286 · Hydrogen peroxide, H2O2, decomposes into water and oxygen when a suitable catalyst is… 9701/13 May/June 2025

13 Hydrogen peroxide, H2O2, decomposes into water and oxygen when a suitable catalyst is added. 20.0cm3 of aqueous hydrogen peroxide decomposes to produce 600cm3 of oxygen at room conditions. What is the concentration of the aqueous hydrogen peroxide? A 5.00moldm–3 B 2.50moldm–3 C 1.25moldm–3 D 0.625moldm–3

1 marks

Answer: B

This question in 9701/13 May/June 2025

Q287 · A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients 9701/13 May/June 2025

15 A washing powder contains sodium hydrogencarbonate, NaHCO3, as one of the ingredients. In a titration, a solution containing 1.00g of this washing powder requires 7.15cm3 of 0.100moldm–3 sulfuric acid for complete reaction. The sodium hydrogencarbonate is the only ingredient that reacts with the acid. What is the percentage by mass of sodium hydrogencarbonate in the washing powder? A 3.0% B 6.0% C 12.0% D 24.0%

1 marks

Answer: C

This question in 9701/13 May/June 2025

Q288 · 0.200mol ethanenitrile reacts with an excess of dilute sodium hydroxide 9701/13 May/June 2025

26 0.200mol ethanenitrile reacts with an excess of dilute sodium hydroxide. The reaction produces organic compound S and ammonia gas only. The reaction has an 80.0% yield. Which mass of S is produced? A 9.60g B 13.1g C 15.4g D 16.4g

1 marks

Answer: B

This question in 9701/13 May/June 2025

Q289 · A 69.0 g sample of nitrogen dioxide is placed in a reaction vessel 9701/14 May/June 2025

10 A 69.0 g sample of nitrogen dioxide is placed in a reaction vessel. The initial pressure of the nitrogen dioxide is P. An effective catalyst is then added and the nitrogen dioxide begins to decompose into its elements. After ten minutes, the total pressure is 1.1P. What is the mass of oxygen molecules in the reaction vessel after ten minutes? A 4.80 g B 9.60 g C 38.4 g D 48.0 g

1 marks

Answer: B

This question in 9701/14 May/June 2025

Q290 · When K2MnO4 reacts with concentrated hydrochloric acid, the products include chlorine… 9701/14 May/June 2025

14 When K2MnO4 reacts with concentrated hydrochloric acid, the products include chlorine molecules and MnCl 2. All of the manganese atoms are reduced to MnCl 2. Both Mn and Cl change their oxidation numbers during the reaction. No other element is oxidised or reduced. Using these changes in oxidation number, how many moles of chlorine will be produced when 1.0 mol of K2MnO4 reacts with an excess of hydrochloric acid? A 2.0 mol B 2.5 mol C 3.0 mol D 4.0 mol

1 marks

Answer: A

This question in 9701/14 May/June 2025

Q291 · A nitrogen–hydrogen mixture, initially in the mole ratio of 1 : 3, reaches equilibrium… 9701/14 May/June 2025

15 A nitrogen–hydrogen mixture, initially in the mole ratio of 1 : 3, reaches equilibrium with ammonia when 50% of the nitrogen has reacted. The total final pressure is p. N2 + 3H2 2NH3 What is the partial pressure of ammonia in the equilibrium mixture? p p p p A B C D 6 4 3 2

1 marks

Answer: C

This question in 9701/14 May/June 2025

Q292 · When 0.010 mol of a hydrocarbon X reacts with 720 cm3 of hydrogen at room conditions, an… 9701/14 May/June 2025

29 When 0.010 mol of a hydrocarbon X reacts with 720 cm3 of hydrogen at room conditions, an alkane is formed. What is hydrocarbon X? A B C D

1 marks

Answer: C

This question in 9701/14 May/June 2025

Q293 · The juice of one lemon reacts completely with 120 cm3 of 0.50 mol dm–3 sodium carbonate… 9701/14 May/June 2025

37 The juice of one lemon reacts completely with 120 cm3 of 0.50 mol dm–3 sodium carbonate solution. The formula of citric acid is HOOCCH2C(OH)(COOH)CH2COOH. No sodium carbonate is left unreacted. What is the amount of citric acid in one lemon assuming that it is the only acid in the sample? A 0.02 mol B 0.04 mol C 0.06 mol D 0.09 mol

1 marks

Answer: B

This question in 9701/14 May/June 2025

Q294 · Methane and steam react to produce hydrogen 9701/11 Oct/Nov 2025

4 Methane and steam react to produce hydrogen. CH4(g) + 2H2O(g)  CO2(g) + 4H2(g) 0.80g of methane and 1.35g of steam react. One of the reactants is used up. Which volume of hydrogen, measured at room conditions, will be produced? A 1.80dm3 B 3.60dm3 C 4.80dm3 D 7.20dm3

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2025

Q295 · The reaction of hydrogen sulfide with sulfur dioxide gives sulfur as one of the products 9701/12 Oct/Nov 2025

3 The reaction of hydrogen sulfide with sulfur dioxide gives sulfur as one of the products. The two relevant redox equations are shown. H2S(aq) S(s) + 2H+(aq) + 2e– SO2(aq) + 4H+(aq) + 4e– S(s) + 2H2O(l) How many moles of hydrogen sulfide are needed to react with sulfur dioxide to produce 1 mol of sulfur? 1 mol 2 mol C 3 mol A B D 2 mol 3 3 2

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2025

Q296 · In an experiment, 0.600 mol of chlorine gas, Cl 2, is reacted with an excess of hot… 9701/12 Oct/Nov 2025

21 In an experiment, 0.600 mol of chlorine gas, Cl 2, is reacted with an excess of hot aqueous sodium hydroxide. One of the products is NaCl O3. Which mass of NaCl O3 is formed? A 21.3 g B 44.7 g C 63.9 g D 128 g

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2025

Q297 · In four separate reactions, W, X, Y and Z, 1 mol of an organic compound reacts with an… 9701/12 Oct/Nov 2025

37 In four separate reactions, W, X, Y and Z, 1 mol of an organic compound reacts with an excess of a reagent. organic compound reagent W (CH2COOH)2 Na X CH3CH(OH)CH2COOH Na2CO3 Y CH3CH(OH)CH2COOH NaOH Z CH(OH)(COOH)CH2COOH Na The volume of any gas produced is collected and measured. All gas volumes are measured at the same temperature and pressure. What is the order of the reactions from greatest total volume of gas collected to least total volume of gas collected? greatest least volume volume A W Y Z X B W Z Y X C Z W X Y D Z X W Y

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2025

Q298 · Butylamine can be produced by the reaction of butanenitrile with hydrogen in the presence… 9701/12 Oct/Nov 2025

38 Butylamine can be produced by the reaction of butanenitrile with hydrogen in the presence of a suitable catalyst. Which volume of hydrogen, measured at room conditions, is required to react completely with 0.500 g of butanenitrile? A 145 cm3 B 174 cm3 C 289 cm3 D 348 cm3

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2025

Q299 · Methane and steam react to produce hydrogen 9701/13 Oct/Nov 2025

4 Methane and steam react to produce hydrogen. CH4(g) + 2H2O(g)  CO2(g) + 4H2(g) 0.80g of methane and 1.35g of steam react. One of the reactants is used up. Which volume of hydrogen, measured at room conditions, will be produced? A 1.80dm3 B 3.60dm3 C 4.80dm3 D 7.20dm3

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2025

Q300 · Equal masses of CaCO3, Ca(NO3)2, BaCO3 and Ba(NO3)2 are thermally decomposed 9701/13 Oct/Nov 2025

20 Equal masses of CaCO3, Ca(NO3)2, BaCO3 and Ba(NO3)2 are thermally decomposed. The volume of gas produced in each experiment is measured under the same conditions. Which compound will produce the greatest volume of gas? A CaCO3 B Ca(NO3)2 C BaCO3 D Ba(NO3)2

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2025