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Topical›Chemistry 9701›Group 2›Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds›Paper 1

Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds — Paper 1 · A Level Chemistry 9701

10.1· 255 questions · 255 marks · 306 min · 2005–2025· Multiple choice

Every Cambridge A Level Chemistry Paper 1 question on similarities and trends in the properties of the group 2 metals, magnesium to barium, and their compounds, laid out as 57 A4 pages with the mark scheme below. Nothing is left out. Free to read, no account.

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Question 1: When a mineral was heated in a Bunsen flame to constant mass, a colourless gas that turned lime water milky was evolved. The remaining soli…Question 2: What properties enable magnesium oxide to be used as a refractory lining in a furnace? 1 It has a high melting point. 2 It has a low therma…Question 3: 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…Question 4: Hydroxyapatite, a basic calcium phosphate, Ca(OH)2.3Ca3(PO4)2, is the mineral found in bone. In older people, calcium ions can be lost from…Question 5: Magnesium oxide may be used for the lining of an electric furnace for making crockery. Which properties of magnesium oxide help to explain …1 / 57
Question 6: Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has a high melting point.…Question 7: 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…Question 8: Which magnesium compounds lose mass when heated by a Bunsen flame? 1 magnesium carbonate 2 magnesium nitrate 3 magnesium oxideQuestion 9: When dangerous chemicals are transported by road, vehicles must carry signs that indicate what measures should be taken in the event of a s…2 / 57
Question 10: Use of the Data Booklet is relevant to this question. The sketch graph shows the variation of one physical or chemical property with anothe…Question 11: The chemical properties of an element at the top of a group in the Periodic Table are often different from those of the rest of the element…Question 12: When a firework is lit a fuel and an oxidising agent react. In such a firework, magnesium is the fuel and barium nitrate is the oxidising a…Question 13: The electronic structure of the outer shell of the element radium is 7s2. Which statements will be correct for radium within its group? 1 T…3 / 57
Question 14: Due to their similar ionic radii, the reactions of lithium and magnesium and their corresponding compounds are very similar. Which statemen…Question 15: Which statements concerning the Group II elements magnesium, calcium and barium are correct? 1 Their reactivity increases with increasing r…Question 16: In some fireworks there is a reaction between powdered aluminium and powdered barium nitrate in which heat is evolved and an unreactive gas…Question 17: River water in a chalky agricultural area may contain Ca2+, Mg2+, CO 2 − , HCO , Cl − and − NO − 3 3 3 ions. In a waterworks, such water is…4 / 57
Question 18: Mohr’s salt is a pale green crystalline solid which is soluble in water. It is a ‘double sulfate’ which contains two cations, one of which …Question 19: The rock dolomite is a double carbonate of magnesium and calcium, CaCO3.MgCO3. When heated strongly, a product called calcined dolomite is …Question 20: Use of the Data Booklet is relevant to this question. The graph represents the variation of a property of the Group II elements. property B…5 / 57
Question 21: A farmer added lime to damp soil, followed by the nitrogenous fertiliser ammonium sulfate. A chemical reaction occurred in the soil. Which …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 property of Group II elements (beryllium to barium) decreases with increasing atomic number? A reactivity with water B second ionisat…Question 24: When organic refuse decomposes in water carboxylic acids are formed. The water becomes acidic and aquatic life is destroyed. Which additive…Question 25: 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 …6 / 57
Question 26: Which property of Group II elements (beryllium to barium) decreases with increasing atomic number? A reactivity with water B second ionisat…Question 27: 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 28: Which property of Group II elements (beryllium to barium) decreases with increasing atomic number? A reactivity with water B second ionisat…Question 29: When organic refuse decomposes in water carboxylic acids are formed. The water becomes acidic and aquatic life is destroyed. Which additive…Question 30: When magnesium nitrate, Mg(NO3)2.7H2O, is heated, which three gases are given off? A dinitrogen oxide, oxygen, water vapour B hydrogen, nit…Question 31: Which property of beryllium and its compounds is typical of the elements below it in Group II? A Be does not react with hot water. B BeCl2 …7 / 57
Question 32: Samples of calcium and barium are separately added to beakers of cold water containing a few drops of litmus solution. Which observations w…Question 33: Equimolar quantities of magnesium carbonate and strontium carbonate are separately heated to bring about complete thermal decomposition. Th…Question 34: 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 35: When ammonia, NH3, is produced in a school or college laboratory, it is usually dried before being collected. Which drying agents may be us…Question 36: When magnesium nitrate, Mg(NO3)2.7H2O, is heated, which three gases are given off? A dinitrogen oxide, oxygen, water vapour B hydrogen, nit…8 / 57
Question 37: Which property of beryllium and its compounds is typical of the elements below it in Group II? A Be does not react with hot water. B BeCl2 …Question 38: Samples of calcium and barium are separately added to beakers of cold water containing a few drops of litmus solution. Which observations w…Question 39: Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrOQuestion 40: Which factor helps to explain why the first ionisation energies of the Group I elements decrease from lithium to sodium to potassium to rub…Question 41: Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has an Mr of 40.3. B It …Question 42: Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrO9 / 57
Question 43: Three elements, X, Y and Z, have the physical properties shown in the table. melting point boiling point density element / g cm-3 / °C / °C…Question 44: Lime mortar is made from quicklime, water and sand. Over a period of time, lime mortar changes into a much harder form. Both fresh and old …Question 45: Use of the Data Booklet is relevant to this question. Which properties would be expected for radium, 88Ra, or its compounds? 1 Radium carbo…Question 46: When a firework is lit, a fuel and an oxidising agent react together. In one such firework, magnesium is the fuel and barium nitrate is the…10 / 57
Question 47: 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 48: Use of the Data Booklet is relevant to this question. A significant contribution to atmospheric carbon dioxide levels comes from the therma…Question 49: Total removal of the pollutant sulfur dioxide, SO2, is difficult, both for economic and technical reasons. The quantities emitted from furn…Question 50: A farmer spreads lime on land which has already been treated with an ammonium nitrate fertiliser. Which reactions will occur in the treated…Question 51: 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…11 / 57
Question 52: The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the h…Question 53: Slaked lime, Ca(OH)2, may be made from limestone, CaCO3. On heating in a lime kiln at 1000 °C, limestone decomposes as follows. reaction 1 …Question 54: What can be seen when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly …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: The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the h…12 / 57
Question 57: Aluminium is extracted by the electrolysis of a molten mixture containing aluminium oxide. By a similar method, magnesium is extracted by t…Question 58: What are the trends in the stated properties as Group II is descended from magnesium to barium? decomposition temperature of the first ioni…Question 59: Use of the Data Booklet is relevant to this question. The nitrates of beryllium, calcium, magnesium, and strontium all decompose in the sam…Question 60: Aluminium is extracted by the electrolysis of a molten mixture containing aluminium oxide. By a similar method, magnesium is extracted by t…13 / 57
Question 61: What are the trends in the stated properties as Group II is descended from magnesium to barium? decomposition temperature of the first ioni…Question 62: Use of the Data Booklet is relevant to this question. The nitrates of beryllium, calcium, magnesium, and strontium all decompose in the sam…Question 63: 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 64: Rat poison needs to be insoluble in rain water but soluble at the low pH of stomach contents. What is a suitable barium compound to use for…14 / 57
Question 65: In which row of the table are all statements comparing the compounds of magnesium and barium correct? solubility of hydroxides solubility o…Question 66: 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 67: The Group II metals have higher melting points than the Group I metals. Which factors could contribute towards the higher melting points? 1…Question 68: Solids W, X, Y and Z are compounds of two different Group II metals. Some of their applications are described below. Compound W is used as …15 / 57
Question 69: 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 70: In which row of the table are all statements comparing the compounds of calcium and barium correct? solubility of solubility of thermal sta…Question 71: Solids W, X, Y and Z are compounds of two different Group II metals. Some of their applications are described below. Compound W is used as …Question 72: Use of the Data Booklet is relevant to this question. Anhydrous magnesium nitrate, Mg(NO3)2 , will decompose when heated, giving a white so…16 / 57
Question 73: In which row of the table are all statements comparing magnesium and barium correct? fourth ionisation reaction of fourth ionisation reacti…Question 74: Solids W, X, Y and Z are compounds of two different Group II metals. Some of their applications are described below. Compound W is used as …Question 75: Strontium metal can be obtained by the electrolysis of molten strontium bromide, SrBr2, using the apparatus shown in the diagram. steel cat…17 / 57
Question 76: A metal, X, reacts with water to produce a colourless solution which gives a white precipitate when mixed with aqueous sulfuric acid. What …Question 77: Which property increases in value going down Group II? A electronegativity B ionic radius C maximum oxidation number D second ionisation en…Question 78: Which row correctly identifies the uses of some of the compounds of Group II metals? used as a used in agriculture refractory lining to inc…Question 79: Which statement explains the observation that magnesium hydroxide dissolves in aqueous ammonium chloride, but not in aqueous sodium chlorid…Question 80: A metal, X, reacts with water to produce a colourless solution which gives a white precipitate when mixed with aqueous sulfuric acid. What …18 / 57
Question 81: Which property increases in value going down Group II? A electronegativity B ionic radius C maximum oxidation number D second ionisation en…Question 82: Which row correctly identifies the uses of some of the compounds of Group II metals? used as a used in agriculture refractory lining to inc…Question 83: The diagram shows some applications of compounds of Group II elements. used as a refractory lining in furnaces or kilns 1 4 calcium 2 used …Question 84: River water in a chalky agricultural area may contain Ca2+, Mg2+, CO3 2–, HCO3 –, Cl − and NO3 – ions. In a water treatment plant, such wat…19 / 57
Question 85: When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are mixed, a white precipitate, Y, forms. The mixture i…Question 86: When calcium is burnt in oxygen, what colour is the flame? A green B red C white D yellowQuestion 87: Group II nitrates undergo thermal decomposition according to the following equation. X(NO3)2 → XO + 2NO2 + 2 1 O2 Which Group II nitr…Question 88: When barium is burnt in oxygen, what colour is the flame? A green B orange C red D whiteQuestion 89: Which statement about the oxides and hydroxides of the Group II elements Mg, Ca, Sr and Ba is correct? A Each of the oxides reacts readily …20 / 57
Question 90: Use of the Data Booklet is relevant to this question. X is an s-block element. X forms an insoluble carbonate with the formula XCO3. X form…Question 91: Which substance will not be a product of the thermal decomposition of hydrated magnesium nitrate? A dinitrogen monoxide B magnesium oxide C…Question 92: When strontium is burnt in oxygen, what colour is the flame? A green B red C white D yellowQuestion 93: Total removal of the pollutant sulfur dioxide, SO2, is difficult. The quantities emitted from furnace chimneys can be lowered by using desu…Question 94: Which statements about calcium oxide are correct? 1 It reacts with cold water. 2 It is produced when calcium nitrate is heated. 3 It can be…Question 95: Total removal of the pollutant sulfur dioxide, SO2, is difficult. The quantities emitted from furnace chimneys can be lowered by using desu…21 / 57
Question 96: Which statements about calcium oxide are correct? 1 It reacts with cold water. 2 It is produced when calcium nitrate is heated. 3 It can be…Question 97: Pieces of calcium and magnesium are reacted separately with cold water. Pieces of calcium and magnesium are also burned separately with oxy…Question 98: X is a mixture of two compounds of Group II elements. X can undergo thermal decomposition to produce a white solid and only two gaseous pro…Question 99: A student examines two semi-precious stones; one is agate, SiO2, and the other is calcite, CaCO3. How could they be distinguished? A Add a …22 / 57
Question 100: 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 101: 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…Question 102: X is a Group II metal. It forms a sulfate which is more soluble than barium sulfate. It forms a hydroxide which is more soluble than calciu…Question 103: 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 104: What happens when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly on t…23 / 57
Question 105: Compound X releases carbon dioxide gas and forms a white solid, Y, when it is heated. Neither X nor Y are soluble in water. Compound Y is u…Question 106: Which property decreases on descending Group II? A radius of the cation, M2+ B reactivity of the element with water C shielding of outermos…Question 107: Which statements about calcium and strontium compounds are correct? 1 When calcium oxide and strontium oxide are added to water they both p…Question 108: When dealing with a spillage of metallic sodium it is important that no toxic or flammable products are formed. Which material should be us…Question 109: River water in a chalky agricultural area contains Ca2+, Mg2+, CO3 2–, HCO3 –, Cl − and NO3 – ions. In a water treatment plant, such water …Question 110: A sample containing 0.40 mol of calcium nitrate was decomposed by heating in a roaring Bunsen burner flame until there was no further decom…24 / 57
Question 111: 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 112: X and Y are both Group 2 metals. X and Y both form hydroxide compounds, but X(OH)2 is more soluble in water than Y(OH)2. If a piece of meta…Question 113: In some areas lime, Ca(OH)2, is added to soil to improve crop growth. Which statement correctly describes a reason why lime improves crop g…25 / 57
Question 114: Solutions of Mg(NO3)2 and Ba(NO3)2 separately undergo a series of reactions. sodium carbonate excess excess solution HCl (aq) NaOH(aq) Mg(N…Question 115: 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 116: Steam is passed over heated magnesium to give compound J and hydrogen. What is not a property of compound J? A It has an Mr of 40.3. B It …Question 117: 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…26 / 57
Question 118: Compound T is a white crystalline solid. When a sample of T was mixed with aqueous sodium hydroxide and heated, a pungent smelling gas was …Question 119: Which row of the table gives correct comparisons between the solubilities of calcium and barium hydroxide and the thermal stabilities of ca…Question 120: 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 121: Which row of the table gives correct comparisons between the solubilities of calcium and barium hydroxide and the thermal stabilities of ca…27 / 57
Question 122: Trends are seen in the physical and chemical properties of the elements of Group 2 and their compounds. Which property shows a decrease fro…Question 123: Calcium oxide is added to water and the resulting mixture is filtered. This filtrate is X. When carbon dioxide is bubbled through filtrate …Question 124: The table gives information about calcium carbonate and calcium hydroxide. Which row is correct? calcium hydroxide calcium carbonate can be…Question 125: Which row correctly describes the reactions of calcium and strontium with water? substance reduced substance oxidised more vigorous reactio…28 / 57
Question 126: Which compound would most usually be added to soil to reduce its acidity? A aluminium hydroxide B calcium hydroxide C magnesium hydroxide D…Question 127: The mineral dolomite is a mixture of magnesium carbonate and calcium carbonate. An aqueous reagent, X, was added to a small sample of dolom…Question 128: Which statements about the elements barium and calcium and their compounds are correct? 1 Barium nitrate decomposes at a higher temperature…Question 129: Radium is an element below barium in Group 2 of the Periodic Table. Which equation shows what happens when solid radium nitrate, Ra(NO3)2, …Question 130: 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 CaCO329 / 57
Question 131: X is a mixture of two compounds of Group 2 elements. X undergoes thermal decomposition to produce a white solid and only two gaseous produc…Question 132: Which statements correctly describe a trend on going down Group 2? 1 Reactivity of the elements increases. 2 First ionisation energy of the…Question 133: Which compound would most usually be added to soil to reduce its acidity? A aluminium hydroxide B calcium hydroxide C magnesium hydroxide D…Question 134: The mineral dolomite is a mixture of magnesium carbonate and calcium carbonate. An aqueous reagent, X, was added to a small sample of dolom…Question 135: Which statements about the elements barium and calcium and their compounds are correct? 1 Barium nitrate decomposes at a higher temperature…30 / 57
Question 136: 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 137: Which row correctly describes one property of barium and one property of barium oxide? observation when pH of solution obtained when barium…Question 138: To manufacture cement, 1000 million tonnes of limestone are decomposed each year. To manufacture lime for agriculture, 200 million tonnes o…Question 139: In Group 2 of the Periodic Table, the properties of the elements and their compounds show regular change down the group. Which property sho…Question 140: Solid barium oxide is added to some ammonium sulfate solution in a test-tube and the mixture is warmed. A piece of damp red litmus paper is…31 / 57
Question 141: An ore contains magnesium carbonate and barium carbonate. A sample of the ore is dissolved in nitric acid. How could this solution be proce…Question 142: When calcium and calcium hydride, CaH2, react separately with water, they each produce a white solid and a colourless gas. The white solid …Question 143: Which statements are correct? 1 Magnesium carbonate decomposes at a lower temperature than calcium carbonate. 2 Calcium hydroxide is more s…Question 144: 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 145: In which row are all statements comparing magnesium and barium correct? fourth ionisation energy reaction with water magnesium barium magne…32 / 57
Question 146: Which statements concerning calcium hydroxide are correct? 1 It is less soluble in water than strontium hydroxide. 2 When it is added to wa…Question 147: 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 148: A sample of anhydrous calcium nitrate is placed in a test-tube and heated in a roaring Bunsen flame until it decomposes. The description of…Question 149: Which statement explains the observation that magnesium hydroxide dissolves in aqueous ammonium chloride, but not in aqueous sodium chlorid…Question 150: Which reaction routes can be used to make a pure sample of barium sulfate? heat dilute dilute filter, wash 1 Ba metal product product 2 pro…33 / 57
Question 151: Which properties increase from magnesium to barium? 1 ionic radius of the cation M2+ 2 screening of outermost electrons by inner shells 3 s…Question 152: Metal T reacts with water to produce a colourless solution. A white precipitate is produced when this colourless solution is mixed with aqu…Question 153: When calcium nitrate thermally decomposes, oxygen is one of the products. Which volume of oxygen is produced under room conditions when 0.5…Question 154: L, M and N are Group 2 metals. L reacts more vigorously with dilute hydrochloric acid than N does. M(OH)2 is more soluble than N(OH)2. What…Question 155: Substance X reacts with water. A gas is given off and the pH of the solution increases. The solution is then reacted with sulfuric acid and…34 / 57
Question 156: Solutions of 0.1 mol dm–3 Mg(NO3)2 and 0.1 mol dm–3 Ba(NO3)2 separately undergo a series of reactions using pure reagents. sodium carbonate…Question 157: A mixture of magnesium carbonate and magnesium nitrate is heated strongly in a hard-glass test-tube. Which gases are formed? 1 carbon dioxi…Question 158: How many of the solutions shown, when added to separate portions of magnesium sulfate solution, produce a white precipitate? HCl (aq) …Question 159: A white solid, Z, is soluble in water. A sample of Z is heated with a Bunsen burner until there is no further change. When the residue is s…Question 160: Which reactions involving calcium and its compounds produce two gaseous products? 1 heating solid anhydrous calcium nitrate 2 heating solid…35 / 57
Question 161: Dilute hydrochloric acid is added to solid barium carbonate and solid magnesium carbonate in separate test-tubes. Dilute sodium hydroxide i…Question 162: River water in an agricultural area contains NH4 +, CO3 2–, HCO3 –, Cl − and NO3 – ions. In a water treatment plant, this water is treated …Question 163: 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 164: Solutions P and Q each contain a different Group 2 ion at the same concentration. One contains Mg2+, the other contains Ba2+. Tests are car…36 / 57
Question 165: Which statement about the compounds of Group 2 elements magnesium to barium is correct? A Carbonates of Group 2 elements produce bubbles wh…Question 166: When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are mixed, a white precipitate, Y, forms. The mixture i…Question 167: 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 168: Solutions P and Q each contain a different Group 2 ion at the same concentration. One contains Mg2+, the other contains Ba2+. Tests are car…37 / 57
Question 169: Compound Z is insoluble in water but soluble at low pH. What could be compound Z? A barium carbonate B barium chloride C barium hydroxide D…Question 170: A student investigates calcium nitrate crystals by heating them in the apparatus shown. A colourless gas leaves the apparatus at Y. A flame…Question 171: An excess of MgO is shaken with water. The resulting mixture is filtered into test-tube P. An excess of BaO is shaken with water. The resul…Question 172: 0.25 g of anhydrous magnesium nitrate is heated strongly until it completely decomposes. What is the total volume of gas produced, measured…38 / 57
Question 173: 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 174: Which property shows an increase from magnesium to barium? A the first ionisation energy of the elements B the oxidising power of the metal…Question 175: Compound T is a white crystalline solid. When a sample of compound T is mixed with aqueous sodium hydroxide and heated, a gas is produced w…Question 176: The statements apply to the elements in Group 2. Which statement is correct? A As atomic number increases, ionic radius increases. B As ato…Question 177: Which property shows an increase from calcium to barium going down Group 2? A the ease of decomposition of the carbonates B the solubility …39 / 57
Question 178: Strontium nitrate is heated strongly for several minutes. Which statements are correct? 1 A brown gas is produced. 2 A gas is produced that…Question 179: This question is about two elements in Group 2, Q and R. Three of the statements shown are correct for metal Q. The one remaining statement…Question 180: A student mixes pairs of chemicals together in separate test-tubes. ● excess calcium (s) + water (l) ● barium chloride (aq) + strontium…Question 181: What are the trends in the stated properties as Group 2 is descended from magnesium to barium? decomposition temperature of the first ionis…Question 182: Sulfur dioxide, SO2, reacts with calcium hydroxide in aqueous solution. What is the main product that is first formed? A Ca(HSO4)2 B CaS C …40 / 57
Question 183: This question is about two elements in Group 2, Q and R. Three of the statements shown are correct for metal Q. The one remaining statement…Question 184: A student mixes pairs of chemicals together in separate test-tubes. ● excess calcium (s) + water (l) ● barium chloride (aq) + strontium…Question 185: What are the trends in the stated properties as Group 2 is descended from magnesium to barium? decomposition temperature of the first ionis…Question 186: Sulfur dioxide, SO2, reacts with calcium hydroxide in aqueous solution. What is the main product that is first formed? A Ca(HSO4)2 B CaS C …41 / 57
Question 187: Which row correctly describes one property of barium and one property of barium oxide? observation when pH of solution obtained when barium…Question 188: An anhydrous white salt, Z, is heated strongly for 30 minutes. A mixture of gases is given off. The solid remaining in the test-tube is the…Question 189: Q is a mixture of a Group 2 oxide and a Group 2 sulfate. Q contains equal amounts of the two compounds. Q is shaken with water and the resu…Question 190: Which substance will not be a product of the thermal decomposition of hydrated magnesium nitrate? A dinitrogen monoxide B magnesium oxide C…Question 191: Which statements are correct? 1 Magnesium carbonate decomposes at a lower temperature than calcium carbonate. 2 Calcium hydroxide is more s…42 / 57
Question 192: A farmer requires a solid compound to raise the pH of the soil in a field from 5.5 to above 6.0. Which compound could the farmer use? A (NH…Question 193: Z is an anhydrous compound of a Group 2 element. When it is heated, Z undergoes thermal decomposition to produce two different gases. Z has…Question 194: Which reaction routes can be used to make a pure sample of barium sulfate? heat dilute dilute filter, wash 1 Ba product product product in …Question 195: Which statement is correct? A Doctors can use the very insoluble MgSO4 to investigate the digestive system. B Farmers can lower the pH of s…Question 196: A solid, X, was placed in an excess of the liquid Y. A colourless gas was given off and a white precipitate was seen. The precipitate was n…43 / 57
Question 197: In which list are all three compounds soluble in water? A barium chloride, calcium carbonate, magnesium hydroxide B barium hydroxide, calci…Question 198: 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 199: Which statements about calcium oxide are correct? 1 It can be reduced by heating with magnesium. 2 It is produced when calcium nitrate is h…Question 200: Which statement about the compounds of the Group 2 metals is correct? A Barium carbonate is less thermally stable than strontium carbonate.…Question 201: 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 202: X is the ion of a metal which burns with a red flame. Y is an ion that reacts with concentrated H2SO4 to produce H2S. What could be the for…44 / 57
Question 203: In separate experiments, 5.0 g samples of each of four s-block metals are added to an excess of water. The gas evolved is collected and its…Question 204: A mixture contains magnesium carbonate and barium carbonate only. A sample of the mixture is dissolved in nitric acid to produce a solution…Question 205: A sample of magnesium nitrate is heated in the apparatus shown. gas collected magnesium nitrate trough water heat The pH of the solution in…45 / 57
Question 206: NH3(aq) is added to separate samples of NaCl (aq), MgCl 2(aq), BaCl 2(aq) and SiCl 4(l). Under the conditions of this experiment, only two …Question 207: The table gives information about calcium carbonate and calcium hydroxide. Which row is correct? calcium hydroxide calcium carbonate is can…Question 208: Q is a Group 2 metal. An excess of QCO3(s) is added to H2SO4(aq) followed by filtration. A sample of QSO4 is then obtained by evaporation o…Question 209: NaOH(aq) is added to separate samples of magnesium chloride and barium chloride solutions. H2SO4(aq) is then added slowly to each reaction …46 / 57
Question 210: 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 211: 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 212: The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the h…Question 213: Which row is correct? the temperature needed to the solubility of decompose Group 2 metal nitrates Group 2 sulfates A decreases down the gr…Question 214: Calcium oxide and magnesium sulfide each react with acid. CaO(s) + 2H+(aq)  Ca2+(aq) + H2O(l) MgS(s) + 2H+(aq)  Mg2+(aq) + H2…47 / 57
Question 215: 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 216: In the diagram, each test-tube W, X, Y and Z contains 25 cm3 of a 0.1 mol dm–3 solution of a salt. W X Y Z 25 cm3 25 cm3 25 cm3 25 cm3 BaCl…Question 217: R is a solid. R fizzes when hydrochloric acid is added. R reacts with hot aqueous sodium hydroxide, giving off a gas which turns red litmus…Question 218: 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…48 / 57
Question 219: The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the h…Question 220: Equal volumes of saturated solutions of magnesium hydroxide, calcium hydroxide and strontium hydroxide are completely neutralised with dilu…Question 221: Which row correctly describes the separate reactions of calcium and strontium with water? substance reduced substance oxidised more vigorou…Question 222: L and M are both compounds of Group 2 elements. L and M are both soluble in water. When solutions of L and M are mixed, a white precipitate…49 / 57
Question 223: 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 224: What happens when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly on t…Question 225: Which row correctly describes the separate reactions of calcium and strontium with water? substance reduced substance oxidised more vigorou…Question 226: L and M are both compounds of Group 2 elements. L and M are both soluble in water. When solutions of L and M are mixed, a white precipitate…Question 227: 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…50 / 57
Question 228: Separate samples of magnesium and calcium are added to an excess of dilute sulfuric acid. The observations are summarised in the table. met…Question 229: Dolomite is a double carbonate, CaMg(CO3)2, and can be used instead of calcium carbonate for treating acidic soils. The three statements al…Question 230: The diagram shows the process of adding calcium nitrate and strontium nitrate to separate boiling tubes and heating them. Identical conditi…51 / 57
Question 231: All solubility data in this question is given at the same temperature. The table gives some data for compounds of calcium and for compounds…Question 232: What is the total volume of gas produced, measured at room conditions, when 0.010 mol of anhydrous magnesium nitrate is completely decompos…Question 233: Compound Q dissolves in water. Q(aq) does not react with dilute sulfuric acid. Q(aq) forms a precipitate when aqueous silver nitrate is add…Question 234: A mixture of calcium carbonate, calcium nitrate, strontium carbonate and strontium nitrate is thermally decomposed. The decomposition react…52 / 57
Question 235: W is a solid that reacts with water to produce an alkaline solution. The addition of two drops of dilute H2SO4 to this alkaline solution pr…Question 236: 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 237: 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 238: Steam is passed over heated magnesium to give compound J and hydrogen. What is not a property of compound J? A It has an Mr of 40.3. B It …Question 239: V and W are two compounds. Each one contains a different Group 2 element. A sample of each solid is added to water, shaken, and the pH of t…53 / 57
Question 240: Compound L decomposes on heating. One of the products is gas M. M reacts with unburned hydrocarbons to form peroxyacetyl nitrate, PAN. What…Question 241: X is a Group 2 element in either Period 3 or Period 5. X(OH)2 is less soluble in water than Ca(OH)2. When X(NO3)2 is heated, it decomposes.…Question 242: Which statement comparing magnesium and barium, or their compounds, is correct? A Magnesium reacts with dilute hydrochloric acid more rapid…Question 243: V and W are two compounds. Each one contains a different Group 2 element. A sample of each solid is added to water, shaken, and the pH of t…54 / 57
Question 244: Compound L decomposes on heating. One of the products is gas M. M reacts with unburned hydrocarbons to form peroxyacetyl nitrate, PAN. What…Question 245: A reaction scheme for a Group 2 metal, M, is shown. reacts with reacts with reacts with oxygen water sulfuric acid M X Y Z Which row is cor…Question 246: River water in an agricultural area contains NH4 +, CO3 2–, HCO3 –, Cl  and NO3 – ions. This water is treated by adding a calculated quant…Question 247: Radium is an element below barium in Group 2 of the Periodic Table. Which equation shows what happens when solid radium nitrate, Ra(NO3)2, …Question 248: Which statement is correct? A Barium oxide reacts with water at room temperature to form barium hydroxide and hydrogen. B Calcium oxide doe…55 / 57
Question 249: W, X, Y and Z are Group 2 elements barium, calcium, magnesium and strontium but not in that order. W reacts faster with dilute hydrochloric…Question 250: Substance J reacts with water. A gas is given off and the pH of the solution increases. The solution is then reacted with sulfuric acid and…Question 251: The flow diagram shows two successive reactions starting from element Q. Element Q is either calcium or barium. 1 heat with oxygen element …Question 252: The trends seen in Group 2 can be used to predict the properties of radium and its compounds. Which statement is correct? A Radium has the …56 / 57
Question 253: 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…Question 254: The trends seen in Group 2 can be used to predict the properties of radium and its compounds. Which statement is correct? A Radium has the …Question 255: 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…57 / 57

Mark scheme255 answers

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

Pastlit

Chemistry 9701 · Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds — Paper 1

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

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Pastlit

Chemistry 9701 · Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds — Paper 1

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

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Pastlit

Chemistry 9701 · Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds — Paper 1

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

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Pastlit

Chemistry 9701 · Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds — Paper 1

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

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149D1
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Pastlit

Chemistry 9701 · Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds — Paper 1

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

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Pastlit

Chemistry 9701 · Similarities and trends in the properties of the Group 2 metals, magnesium to barium, and their compounds — Paper 1

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

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Another paper, or another topic

Paper
Paper 1255 questionsPaper 2questions comingPaper 4questions comingPaper 5questions coming

All of Group 2 →

Questions as text

Q1 · When a mineral was heated in a Bunsen flame to constant mass, a colourless gas that… 9701/11 Oct/Nov 2005

16 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 Oct/Nov 2005

Q2 · What properties enable magnesium oxide to be used as a refractory lining in a furnace? 9701/11 Oct/Nov 2005

35 What properties enable magnesium oxide to be used as a refractory lining in a furnace? 1 It has a high melting point. 2 It has a low thermal conductivity. 3 It does not react with basic slags.

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2005

Q3 · 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

Q4 · Hydroxyapatite, a basic calcium phosphate, Ca(OH)2.3Ca3(PO4)2, is the mineral found in… 9701/11 May/June 2006

35 Hydroxyapatite, a basic calcium phosphate, Ca(OH)2.3Ca3(PO4)2, is the mineral found in bone. In older people, calcium ions can be lost from the hydroxyapatite, weakening the bone structure. In such cases, strontium salts are administered to strengthen the bone. The strontium ions replace the lost calcium ions in the hydroxyapatite. Which statements are correct? 1 Strontium ions are nearly the same size as calcium ions and so may easily replace them in the hydroxyapatite. 2 Strontium hydroxide is less soluble than calcium hydroxide and so will precipitate better in the bone structure. 3 There is ionic, covalent and metallic bonding in hydroxyapatite which gives it strength.

1 marks

Answer: D

This question in 9701/11 May/June 2006

Q5 · Magnesium oxide may be used for the lining of an electric furnace for making crockery 9701/11 Oct/Nov 2006

7 Magnesium oxide may be used for the lining of an electric furnace for making crockery. Which properties of magnesium oxide help to explain this use? strong forces ionic electrical between particles bonding conductor A yes yes no B yes no yes C no yes no D no no yes

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2006

Q6 · Steam is passed over heated magnesium to give compound X and hydrogen 9701/11 Oct/Nov 2006

13 Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has a high melting point. B It is a basic oxide. C It is a white solid. D It is very soluble in water.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2006

Q7 · 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

Q8 · Which magnesium compounds lose mass when heated by a Bunsen flame? 9701/11 Oct/Nov 2006

34 Which magnesium compounds lose mass when heated by a Bunsen flame? 1 magnesium carbonate 2 magnesium nitrate 3 magnesium oxide

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2006

Q9 · When dangerous chemicals are transported by road, vehicles must carry signs that indicate… 9701/11 Oct/Nov 2007

12 When dangerous chemicals are transported by road, vehicles must carry signs that indicate what measures should be taken in the event of a spillage of the chemical carried. Which material must be used if there were a spillage of metallic sodium? A ethanol B jets of water C sand D water spray

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2007

Q10 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2007

14 Use of the Data Booklet is relevant to this question. The sketch graph shows the variation of one physical or chemical property with another for the Group II elements. y x What are the correct labels for the axes? x-axis y-axis A atomic number mass number B atomic number melting point C first ionisation energy atomic number D first ionisation energy atomic radius

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2007

Q11 · The chemical properties of an element at the top of a group in the Periodic Table are… 9701/11 Oct/Nov 2007

15 The chemical properties of an element at the top of a group in the Periodic Table are often different from those of the rest of the elements in the group. Of the following properties of beryllium and its compounds, which property is typical of the elements below it in Group II? A Be does not react with hot water. B BeCl2 is covalent. C Be(NO3)2 produces BeO on thermal decomposition. D BeO dissolves in alkalis.

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2007

Q12 · When a firework is lit a fuel and an oxidising agent react 9701/11 Oct/Nov 2007

35 When a firework is lit a fuel and an oxidising agent react. In such a firework, magnesium is the fuel and barium nitrate is the oxidising agent. Which solid products are produced when the firework is lit? 1 BaO 2 MgO 3 Mg(NO3)2

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2007

Q13 · The electronic structure of the outer shell of the element radium is 7s2 9701/11 May/June 2008

35 The electronic structure of the outer shell of the element radium is 7s2. Which statements will be correct for radium within its group? 1 The element will decompose water, liberating hydrogen. 2 The element will show an oxidation number of +2 in all its compounds. 3 Radium has the highest first ionisation energy.

1 marks

Answer: B

This question in 9701/11 May/June 2008

Q14 · Due to their similar ionic radii, the reactions of lithium and magnesium and their… 9701/11 Oct/Nov 2008

16 Due to their similar ionic radii, the reactions of lithium and magnesium and their corresponding compounds are very similar. Which statement concerning the reactions of lithium and its compounds is correct? A Lithium carbonate decomposes on heating at a relatively low temperature, forming lithium oxide and carbon dioxide. B Lithium nitrate decomposes on heating, forming lithium nitrite and oxygen. C Lithium burns only slowly in oxygen. D Lithium reacts violently with cold water, liberating hydrogen.

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2008

Q15 · Which statements concerning the Group II elements magnesium, calcium and barium are… 9701/11 Oct/Nov 2008

34 Which statements concerning the Group II elements magnesium, calcium and barium are correct? 1 Their reactivity increases with increasing relative atomic mass. 2 The oxidation number exhibited in their stable compounds is +2. 3 On strong heating, their nitrates give off oxygen only.

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2008

Q16 · In some fireworks there is a reaction between powdered aluminium and powdered barium… 9701/11 May/June 2009

11 In some fireworks there is a reaction between powdered aluminium and powdered barium nitrate in which heat is evolved and an unreactive gas is produced. What is the equation for this reaction? A 2Al + Ba(NO3)2 → Al2O3 + BaO + 2NO B 4Al + 4Ba(NO3)2 → 2Al2O3 + 4Ba(NO2)2 + O2 C 10Al + 3Ba(NO3)2 → 5Al2O3 + 3BaO + 3N2 D 10Al + 18Ba(NO3)2 → 10Al(NO3)3 + 18BaO + 3N2

1 marks

Answer: C

This question in 9701/11 May/June 2009

Q17 · River water in a chalky agricultural area may contain Ca2+, Mg2+, CO 2 − , HCO , Cl − and… 9701/11 May/June 2009

13 River water in a chalky agricultural area may contain Ca2+, Mg2+, CO 2 − , HCO , Cl − and − NO − 3 3 3 ions. In a waterworks, such water is treated by adding a calculated quantity of calcium hydroxide. What will be precipitated following the addition of calcium hydroxide? A CaCl2 B CaCO3 C Ca(NO3) 2 D Mg(NO3)2

1 marks

Answer: B

This question in 9701/11 May/June 2009

Q18 · Mohr’s salt is a pale green crystalline solid which is soluble in water 9701/11 May/June 2009

18 Mohr’s salt is a pale green crystalline solid which is soluble in water. It is a ‘double sulfate’ which contains two cations, one of which is Fe2+. The identity of the second cation was determined by heating solid Mohr’s salt with solid sodium hydroxide and a colourless gas was evolved. The gas readily dissolved in water giving an alkaline solution. A grey-green solid residue was also formed which was insoluble in water. What are the identities of the gas and the solid residue? gas residue A H2 FeSO4 B NH3 Na2SO4 C NH3 Fe(OH)2 D SO2 Fe(OH)2

1 marks

Answer: C

This question in 9701/11 May/June 2009

Q19 · The rock dolomite is a double carbonate of magnesium and calcium, CaCO3.MgCO3 9701/11 May/June 2009

35 The rock dolomite is a double carbonate of magnesium and calcium, CaCO3.MgCO3. When heated strongly, a product called calcined dolomite is formed which is used to line some furnaces for the production of metals. Why is calcined dolomite used for this purpose? 1 It is a refractory material. 2 It will absorb acidic impurities in metallurgical processes. 3 It will reduce metallic oxides to metals.

1 marks

Answer: B

This question in 9701/11 May/June 2009

Q20 · Use of the Data Booklet is relevant to this question 9701/11 Oct/Nov 2009

3 Use of the Data Booklet is relevant to this question. The graph represents the variation of a property of the Group II elements. property Be Mg Ca Sr Ba What is this property? A ionic radius B ionisation energy C neutron / proton ratio D rate of reaction with water

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2009

Q21 · A farmer added lime to damp soil, followed by the nitrogenous fertiliser ammonium sulfate 9701/11 Oct/Nov 2009

35 A farmer added lime to damp soil, followed by the nitrogenous fertiliser ammonium sulfate. A chemical reaction occurred in the soil. Which substances were formed in this reaction? 1 sulfuric acid 2 calcium sulfate 3 ammonia

1 marks

Answer: C

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 property of Group II elements (beryllium to barium) decreases with increasing… 9701/11 May/June 2010

17 Which property of Group II elements (beryllium to barium) decreases with increasing atomic number? A reactivity with water B second ionisation energy C solubility of hydroxides D stability of the carbonates

1 marks

Answer: B

This question in 9701/11 May/June 2010

Q24 · When organic refuse decomposes in water carboxylic acids are formed 9701/11 May/June 2010

34 When organic refuse decomposes in water carboxylic acids are formed. The water becomes acidic and aquatic life is destroyed. Which additives are suitable to remove this acid pollution? 1 calcium carbonate 2 calcium hydroxide 3 potassium nitrate

1 marks

Answer: B

This question in 9701/11 May/June 2010

Q25 · 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

Q26 · Which property of Group II elements (beryllium to barium) decreases with increasing… 9701/12 May/June 2010

19 Which property of Group II elements (beryllium to barium) decreases with increasing atomic number? A reactivity with water B second ionisation energy C solubility of hydroxides D stability of the carbonates

1 marks

Answer: B

This question in 9701/12 May/June 2010

Q27 · 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

Q28 · Which property of Group II elements (beryllium to barium) decreases with increasing… 9701/13 May/June 2010

18 Which property of Group II elements (beryllium to barium) decreases with increasing atomic number? A reactivity with water B second ionisation energy C solubility of hydroxides D stability of the carbonates

1 marks

Answer: B

This question in 9701/13 May/June 2010

Q29 · When organic refuse decomposes in water carboxylic acids are formed 9701/13 May/June 2010

35 When organic refuse decomposes in water carboxylic acids are formed. The water becomes acidic and aquatic life is destroyed. Which additives are suitable to remove this acid pollution? 1 calcium carbonate 2 calcium hydroxide 3 potassium nitrate

1 marks

Answer: B

This question in 9701/13 May/June 2010

Q30 · When magnesium nitrate, Mg(NO3)2.7H2O, is heated, which three gases are given off? 9701/11 Oct/Nov 2010

14 When magnesium nitrate, Mg(NO3)2.7H2O, is heated, which three gases are given off? A dinitrogen oxide, oxygen, water vapour B hydrogen, nitrogen, oxygen C hydrogen, nitrogen dioxide, oxygen D nitrogen dioxide, oxygen, water vapour

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2010

Q31 · Which property of beryllium and its compounds is typical of the elements below it in… 9701/11 Oct/Nov 2010

19 Which property of beryllium and its compounds is typical of the elements below it in Group II? A Be does not react with hot water. B BeCl2 is covalent. C Be(NO3)2 produces BeO on thermal decomposition. D BeO dissolves in alkalis.

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2010

Q32 · Samples of calcium and barium are separately added to beakers of cold water containing a… 9701/11 Oct/Nov 2010

34 Samples of calcium and barium are separately added to beakers of cold water containing a few drops of litmus solution. Which observations will be made with only the calcium and not with the barium? 1 A white suspension appears in the water. 2 The solution turns blue. 3 A gas is evolved.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2010

Q33 · Equimolar quantities of magnesium carbonate and strontium carbonate are separately heated… 9701/12 Oct/Nov 2010

12 Equimolar quantities of magnesium carbonate and strontium carbonate are separately heated to bring about complete thermal decomposition. The minimum temperature for this to occur is called Td. The cold residues are separately added to equal volumes of water and the change in pH is measured. The change in pH is called ∆pH. Which metal has the higher value of Td, and the greater value of ∆pH? Td ∆pH A Mg Mg B Mg Sr C Sr Mg D Sr Sr

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2010

Q34 · 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

Q35 · When ammonia, NH3, is produced in a school or college laboratory, it is usually dried… 9701/12 Oct/Nov 2010

31 When ammonia, NH3, is produced in a school or college laboratory, it is usually dried before being collected. Which drying agents may be used to dry ammonia? 1 calcium oxide, CaO 2 phosphorus(V) oxide, P4O10 3 concentrated sulfuric acid, H2SO4

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2010

Q36 · When magnesium nitrate, Mg(NO3)2.7H2O, is heated, which three gases are given off? 9701/13 Oct/Nov 2010

17 When magnesium nitrate, Mg(NO3)2.7H2O, is heated, which three gases are given off? A dinitrogen oxide, oxygen, water vapour B hydrogen, nitrogen, oxygen C hydrogen, nitrogen dioxide, oxygen D nitrogen dioxide, oxygen, water vapour

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2010

Q37 · Which property of beryllium and its compounds is typical of the elements below it in… 9701/13 Oct/Nov 2010

19 Which property of beryllium and its compounds is typical of the elements below it in Group II? A Be does not react with hot water. B BeCl2 is covalent. C Be(NO3)2 produces BeO on thermal decomposition. D BeO dissolves in alkalis.

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2010

Q38 · Samples of calcium and barium are separately added to beakers of cold water containing a… 9701/13 Oct/Nov 2010

35 Samples of calcium and barium are separately added to beakers of cold water containing a few drops of litmus solution. Which observations will be made with only the calcium and not with the barium? 1 A white suspension appears in the water. 2 The solution turns blue. 3 A gas is evolved.

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2010

Q39 · Which oxides react with water to give a solution of pH 10 or higher? 9701/11 May/June 2011

35 Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrO

1 marks

Answer: A

This question in 9701/11 May/June 2011

Q40 · Which factor helps to explain why the first ionisation energies of the Group I elements… 9701/13 May/June 2011

2 Which factor helps to explain why the first ionisation energies of the Group I elements decrease from lithium to sodium to potassium to rubidium? A The nuclear charge of the elements increases. B The outer electron is in an ‘s’ subshell. C The repulsion between spin-paired electrons increases. D The shielding effect of the inner shells increases.

1 marks

Answer: D

This question in 9701/13 May/June 2011

Q41 · Steam is passed over heated magnesium to give compound X and hydrogen 9701/13 May/June 2011

14 Steam is passed over heated magnesium to give compound X and hydrogen. What is not a property of compound X? A It has an Mr of 40.3. B It is basic. C It is a white solid. D It is very soluble in water.

1 marks

Answer: D

This question in 9701/13 May/June 2011

Q42 · Which oxides react with water to give a solution of pH 10 or higher? 9701/13 May/June 2011

38 Which oxides react with water to give a solution of pH 10 or higher? 1 CaO 2 Na2O 3 SrO

1 marks

Answer: A

This question in 9701/13 May/June 2011

Q43 · Three elements, X, Y and Z, have the physical properties shown in the table 9701/11 Oct/Nov 2011

1 Three elements, X, Y and Z, have the physical properties shown in the table. melting point boiling point density element / g cm-3 / °C / °C X –7 59 3.12 Y 98 883 0.97 Z 649 1107 1.74 What could be the identities of X, Y and Z? X Y Z A Br2 Al Si B Br2 Na Mg C I2 Mg Na D I2 Si K

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2011

Q44 · Lime mortar is made from quicklime, water and sand 9701/12 Oct/Nov 2011

18 Lime mortar is made from quicklime, water and sand. Over a period of time, lime mortar changes into a much harder form. Both fresh and old lime mortar react with aqueous hydrochloric acid but only the old lime mortar effervesces during the reaction. Which equation describes the change from fresh to old lime mortar? A CaO + CO2 → CaCO3 B CaO + H2O → Ca(OH)2 C Ca(OH)2 → CaO + H2O D Ca(OH)2 + CO2 → CaCO3 + H2O

1 marks

This question in 9701/12 Oct/Nov 2011

Q45 · Use of the Data Booklet is relevant to this question 9701/12 Oct/Nov 2011

34 Use of the Data Booklet is relevant to this question. Which properties would be expected for radium, 88Ra, or its compounds? 1 Radium carbonate would not decompose at the temperature of a Bunsen flame. 2 Radium hydroxide is very insoluble. 3 Radium does not react with cold water.

1 marks

This question in 9701/12 Oct/Nov 2011

Q46 · When a firework is lit, a fuel and an oxidising agent react together 9701/12 Oct/Nov 2011

35 When a firework is lit, a fuel and an oxidising agent react together. In one such firework, magnesium is the fuel and barium nitrate is the oxidising agent. Which solids are produced when the firework is lit? 1 BaO 2 MgO 3 Mg(NO3)2

1 marks

This question in 9701/12 Oct/Nov 2011

Q47 · 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

Q48 · 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

Q49 · Total removal of the pollutant sulfur dioxide, SO2, is difficult, both for economic and… 9701/13 Oct/Nov 2011

20 Total removal of the pollutant sulfur dioxide, SO2, is difficult, both for economic and technical reasons. The quantities emitted from furnace chimneys can be lowered by using desulfurisation plants. The gases are scrubbed (washed) with calcium hydroxide to remove the SO2. What is the main product formed initially? A Ca(HSO4)2 B CaS C CaSO3 D CaSO4

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2011

Q50 · A farmer spreads lime on land which has already been treated with an ammonium nitrate… 9701/13 Oct/Nov 2011

35 A farmer spreads lime on land which has already been treated with an ammonium nitrate fertiliser. Which reactions will occur in the treated soil? 1 Ca(OH)2 + 2NH4 +(aq) → Ca2+(aq) + 2NH3 + 2H2O 2 Ca(OH)2 + 2H+(aq) → Ca2+(aq) + 2H2O 3 Ca(OH)2 + CO2 → CaCO3 + H2O

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2011

Q51 · 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

Q52 · The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water 9701/11 May/June 2012

15 The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the highest pH? A BaO(aq) B CaO(aq) C MgO(aq) D SrO(aq)

1 marks

Answer: A

This question in 9701/11 May/June 2012

Q53 · Slaked lime, Ca(OH)2, may be made from limestone, CaCO3 9701/12 May/June 2012

14 Slaked lime, Ca(OH)2, may be made from limestone, CaCO3. On heating in a lime kiln at 1000 °C, limestone decomposes as follows. reaction 1 CaCO3(s) → CaO(s) + CO2(g) Water is then reacted with calcium oxide, CaO, as follows. reaction 2 CaO(s) + H2O(l) → Ca(OH)2(s) What are the enthalpy changes of these reactions? reaction 1 reaction 2 A endothermic endothermic B endothermic exothermic C exothermic endothermic D exothermic exothermic

1 marks

Answer: B

This question in 9701/12 May/June 2012

Q54 · What can be seen when a piece of magnesium ribbon is placed in cold water? 9701/12 May/June 2012

17 What can be seen when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly on the magnesium. C The magnesium floats on the surface of the water and reacts quickly. D The magnesium glows and a white solid is produced.

1 marks

Answer: B

This question in 9701/12 May/June 2012

Q55 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2012

12 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 9701/13 May/June 2012

Q56 · The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water 9701/13 May/June 2012

14 The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the highest pH? A BaO(aq) B CaO(aq) C MgO(aq) D SrO(aq)

1 marks

Answer: A

This question in 9701/13 May/June 2012

Q57 · Aluminium is extracted by the electrolysis of a molten mixture containing aluminium oxide 9701/11 Oct/Nov 2012

7 Aluminium is extracted by the electrolysis of a molten mixture containing aluminium oxide. By a similar method, magnesium is extracted by the electrolysis of a molten mixture containing magnesium chloride. Which statement about the extraction of magnesium is correct? A Magnesium ions travel to the anode and are oxidised to magnesium metal. B Magnesium ions travel to the anode and are reduced to magnesium metal. C Magnesium ions travel to the cathode and are oxidised to magnesium metal. D Magnesium ions travel to the cathode and are reduced to magnesium metal.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2012

Q58 · What are the trends in the stated properties as Group II is descended from magnesium to… 9701/11 Oct/Nov 2012

14 What are the trends in the stated properties as Group II is descended from magnesium to barium? decomposition temperature of the first ionisation energy carbonate A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2012

Q59 · 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

Q60 · Aluminium is extracted by the electrolysis of a molten mixture containing aluminium oxide 9701/12 Oct/Nov 2012

7 Aluminium is extracted by the electrolysis of a molten mixture containing aluminium oxide. By a similar method, magnesium is extracted by the electrolysis of a molten mixture containing magnesium chloride. Which statement about the extraction of magnesium is correct? A Magnesium ions travel to the anode and are oxidised to magnesium metal. B Magnesium ions travel to the anode and are reduced to magnesium metal. C Magnesium ions travel to the cathode and are oxidised to magnesium metal. D Magnesium ions travel to the cathode and are reduced to magnesium metal.

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2012

Q61 · What are the trends in the stated properties as Group II is descended from magnesium to… 9701/12 Oct/Nov 2012

14 What are the trends in the stated properties as Group II is descended from magnesium to barium? decomposition temperature of the first ionisation energy carbonate A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2012

Q62 · 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

Q63 · 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

Q64 · Rat poison needs to be insoluble in rain water but soluble at the low pH of stomach… 9701/13 Oct/Nov 2012

16 Rat poison needs to be insoluble in rain water but soluble at the low pH of stomach contents. What is a suitable barium compound to use for rat poison? A barium carbonate B barium chloride C barium hydroxide D barium sulfate

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2012

Q65 · In which row of the table are all statements comparing the compounds of magnesium and… 9701/11 May/June 2013

13 In which row of the table are all statements comparing the compounds of magnesium and barium correct? solubility of hydroxides solubility of sulfates solubility of solubility of barium solubility of solubility of barium magnesium hydroxide magnesium sulfate sulfate hydroxide A higher lower higher lower B higher lower lower higher C lower higher higher lower D lower higher lower higher

1 marks

Answer: C

This question in 9701/11 May/June 2013

Q66 · 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

Q67 · The Group II metals have higher melting points than the Group I metals 9701/11 May/June 2013

32 The Group II metals have higher melting points than the Group I metals. Which factors could contribute towards the higher melting points? 1 There are smaller interatomic distances in the metallic lattices of the Group II metals. 2 More electrons are available from each Group II metal atom for bonding the atom into the metallic lattice. 3 Group II metals have a higher first ionisation energy than the corresponding Group I metal.

1 marks

Answer: B

This question in 9701/11 May/June 2013

Q68 · Solids W, X, Y and Z are compounds of two different Group II metals 9701/11 May/June 2013

35 Solids W, X, Y and Z are compounds of two different Group II metals. Some of their applications are described below. Compound W is used as a refractory lining material in kilns. Compound X is used as a building material. It can also be heated in a kiln to form compound Y. When Y is hydrated, it forms compound Z which is used agriculturally to treat soils. Which statements about these compounds are correct? 1 More acid is neutralised by 1 g of W than by 1 g of X. 2 The metallic element in W reacts with water more quickly than the metallic element in Y. 3 Adding Z to a soil decreases the pH of the soil.

1 marks

Answer: D

This question in 9701/11 May/June 2013

Q69 · 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

Q70 · In which row of the table are all statements comparing the compounds of calcium and… 9701/12 May/June 2013

14 In which row of the table are all statements comparing the compounds of calcium and barium correct? solubility of solubility of thermal stability of thermal stability of calcium hydroxide barium hydroxide calcium carbonate barium carbonate A higher lower higher lower B higher lower lower higher C lower higher higher lower D lower higher lower higher

1 marks

Answer: D

This question in 9701/12 May/June 2013

Q71 · Solids W, X, Y and Z are compounds of two different Group II metals 9701/12 May/June 2013

34 Solids W, X, Y and Z are compounds of two different Group II metals. Some of their applications are described below. Compound W is used as a refractory lining material in kilns. Compound X is used as a building material. It can also be heated in a kiln to form compound Y. When Y is hydrated, it forms compound Z which is used agriculturally to treat soils. Which statements about these compounds are correct? 1 Adding W to water has less effect on pH than adding Y. 2 Adding Z to soil increases the pH of the soil. 3 The metallic element in Y reacts with cold water more quickly than the metallic element in W.

1 marks

Answer: A

This question in 9701/12 May/June 2013

Q72 · 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

Q73 · In which row of the table are all statements comparing magnesium and barium correct? 9701/13 May/June 2013

13 In which row of the table are all statements comparing magnesium and barium correct? fourth ionisation reaction of fourth ionisation reaction of barium energy of magnesium with energy of barium with cold water magnesium cold water A higher lower faster slower B higher lower slower faster C lower higher faster slower D lower higher slower faster

1 marks

Answer: B

This question in 9701/13 May/June 2013

Q74 · Solids W, X, Y and Z are compounds of two different Group II metals 9701/13 May/June 2013

35 Solids W, X, Y and Z are compounds of two different Group II metals. Some of their applications are described below. Compound W is used as a refractory lining material in kilns. Compound X is used as a building material. It can also be heated in a kiln to form compound Y. When Y is hydrated, it forms compound Z which is used agriculturally to treat soils. Which statements about these compounds are correct? 1 More acid is neutralised by 2.0 g of X than by 2.0 g of W. 2 The Mr of X is greater than the Mr of Y by 44.0. 3 The metallic element in Y reacts with cold water more quickly then the metallic element in W.

1 marks

Answer: C

This question in 9701/13 May/June 2013

Q75 · Strontium metal can be obtained by the electrolysis of molten strontium bromide, SrBr2… 9701/11 Oct/Nov 2013

12 Strontium metal can be obtained by the electrolysis of molten strontium bromide, SrBr2, using the apparatus shown in the diagram. steel cathode atmosphere of argon graphite anode molten strontium molten strontium bromide heat Why is an atmosphere of argon used around the cathode? A A thin film of a compound of strontium and argon forms on the surface protecting the freshly formed metal. B The argon keeps the strontium molten. C The argon stops the molten strontium rising too high in the tube. D Without the argon, strontium oxide would form in the air.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2013

Q76 · A metal, X, reacts with water to produce a colourless solution which gives a white… 9701/11 Oct/Nov 2013

13 A metal, X, reacts with water to produce a colourless solution which gives a white precipitate when mixed with aqueous sulfuric acid. What is metal X? A barium B magnesium C potassium D sodium

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2013

Q77 · Which property increases in value going down Group II? 9701/11 Oct/Nov 2013

14 Which property increases in value going down Group II? A electronegativity B ionic radius C maximum oxidation number D second ionisation energy

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2013

Q78 · Which row correctly identifies the uses of some of the compounds of Group II metals? 9701/11 Oct/Nov 2013

15 Which row correctly identifies the uses of some of the compounds of Group II metals? used as a used in agriculture refractory lining to increase the pH in kilns of a soil A CaO Ca(OH)2 B CaO Mg(OH)2 C MgO Ca(OH)2 D MgO Mg(OH)2

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2013

Q79 · Which statement explains the observation that magnesium hydroxide dissolves in aqueous… 9701/11 Oct/Nov 2013

17 Which statement explains the observation that magnesium hydroxide dissolves in aqueous ammonium chloride, but not in aqueous sodium chloride? A The ionic radius of the NH4 + ion is similar to that of Mg2+ but not that of Na+. B NH4Cl dissociates less fully than NaCl. C The Na+ and Mg2+ ions have the same number of electrons. D The NH4 + ion can donate a proton.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2013

Q80 · A metal, X, reacts with water to produce a colourless solution which gives a white… 9701/12 Oct/Nov 2013

13 A metal, X, reacts with water to produce a colourless solution which gives a white precipitate when mixed with aqueous sulfuric acid. What is metal X? A barium B magnesium C potassium D sodium

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2013

Q81 · Which property increases in value going down Group II? 9701/12 Oct/Nov 2013

14 Which property increases in value going down Group II? A electronegativity B ionic radius C maximum oxidation number D second ionisation energy

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2013

Q82 · Which row correctly identifies the uses of some of the compounds of Group II metals? 9701/12 Oct/Nov 2013

15 Which row correctly identifies the uses of some of the compounds of Group II metals? used as a used in agriculture refractory lining to increase the pH in kilns of a soil A CaO Ca(OH)2 B CaO Mg(OH)2 C MgO Ca(OH)2 D MgO Mg(OH)2

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2013

Q83 · The diagram shows some applications of compounds of Group II elements 9701/13 Oct/Nov 2013

13 The diagram shows some applications of compounds of Group II elements. used as a refractory lining in furnaces or kilns 1 4 calcium 2 used as a 5 magnesium carbonate building material oxide 3 6 used to manufacture an agricultural chemical to adjust soil pH Which numbered links are correct? calcium carbonate magnesium oxide A 1, 2 and 3 4 and 5 only B 1, 2 and 3 5 and 6 only C 2 and 3 only 4 only D 2 and 3 only 6 only

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2013

Q84 · River water in a chalky agricultural area may contain Ca2+, Mg2+, CO3 2–, HCO3 –, Cl −… 9701/13 Oct/Nov 2013

14 River water in a chalky agricultural area may contain Ca2+, Mg2+, CO3 2–, HCO3 –, Cl − and NO3 – ions. In a water treatment plant, such water is treated by adding a calculated quantity of calcium hydroxide. What will be precipitated from the river water following the addition of calcium hydroxide? A CaCl 2 B CaCO3 C Ca(NO3)2 D Mg(NO3)2

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2013

Q85 · When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are… 9701/11 May/June 2014

13 When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are mixed, a white precipitate, Y, forms. The mixture is filtered and carbon dioxide is bubbled through the filtrate, producing a second white precipitate, Z. What are Y and Z? Y Z A Ba(OH)2 Ca(OH)2 B Ba(OH)2 CaCO3 C Ca(OH)2 BaCO3 D Ca(OH)2 Ba(OH)2

1 marks

Answer: C

This question in 9701/11 May/June 2014

Q86 · When calcium is burnt in oxygen, what colour is the flame? 9701/11 May/June 2014

15 When calcium is burnt in oxygen, what colour is the flame? A green B red C white D yellow

1 marks

Answer: B

This question in 9701/11 May/June 2014

Q87 · Group II nitrates undergo thermal decomposition according to the following equation 9701/11 May/June 2014

17 Group II nitrates undergo thermal decomposition according to the following equation. X(NO3)2 → XO + 2NO2 + 2 1 O2 Which Group II nitrate requires the highest temperature to bring about its thermal decomposition? A barium nitrate B calcium nitrate C magnesium nitrate D strontium nitrate

1 marks

Answer: A

This question in 9701/11 May/June 2014

Q88 · When barium is burnt in oxygen, what colour is the flame? 9701/12 May/June 2014

12 When barium is burnt in oxygen, what colour is the flame? A green B orange C red D white

1 marks

Answer: A

This question in 9701/12 May/June 2014

Q89 · Which statement about the oxides and hydroxides of the Group II elements Mg, Ca, Sr and… 9701/12 May/June 2014

15 Which statement about the oxides and hydroxides of the Group II elements Mg, Ca, Sr and Ba is correct? A Each of the oxides reacts readily with water to form a solution of pH 12 or above. B Magnesium oxide is used as a furnace lining because it has a giant molecular structure and hence a high melting point. C The hydroxides are produced directly by the thermal decomposition of the corresponding nitrates. D The solubility of the hydroxides increases from Mg(OH)2 to Ba(OH)2.

1 marks

Answer: D

This question in 9701/12 May/June 2014

Q90 · Use of the Data Booklet is relevant to this question 9701/13 May/June 2014

13 Use of the Data Booklet is relevant to this question. X is an s-block element. X forms an insoluble carbonate with the formula XCO3. X forms a hydroxide that is more soluble than strontium hydroxide. What could be the identity of X? A barium B calcium C cobalt D rubidium

1 marks

Answer: A

This question in 9701/13 May/June 2014

Q91 · Which substance will not be a product of the thermal decomposition of hydrated magnesium… 9701/13 May/June 2014

15 Which substance will not be a product of the thermal decomposition of hydrated magnesium nitrate? A dinitrogen monoxide B magnesium oxide C oxygen D steam

1 marks

Answer: A

This question in 9701/13 May/June 2014

Q92 · When strontium is burnt in oxygen, what colour is the flame? 9701/13 May/June 2014

19 When strontium is burnt in oxygen, what colour is the flame? A green B red C white D yellow

1 marks

Answer: B

This question in 9701/13 May/June 2014

Q93 · Total removal of the pollutant sulfur dioxide, SO2, is difficult 9701/11 Oct/Nov 2014

18 Total removal of the pollutant sulfur dioxide, SO2, is difficult. The quantities emitted from furnace chimneys can be lowered by using desulfurisation plants. The gases are reacted with calcium hydroxide to remove the SO2. What is the main product formed initially? A Ca(HSO4)2 B CaS C CaSO3 D CaSO4

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2014

Q94 · Which statements about calcium oxide are correct? 9701/11 Oct/Nov 2014

36 Which statements about calcium oxide are correct? 1 It reacts with cold water. 2 It is produced when calcium nitrate is heated. 3 It can be reduced by heating with magnesium.

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2014

Q95 · Total removal of the pollutant sulfur dioxide, SO2, is difficult 9701/12 Oct/Nov 2014

18 Total removal of the pollutant sulfur dioxide, SO2, is difficult. The quantities emitted from furnace chimneys can be lowered by using desulfurisation plants. The gases are reacted with calcium hydroxide to remove the SO2. What is the main product formed initially? A Ca(HSO4)2 B CaS C CaSO3 D CaSO4

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2014

Q96 · Which statements about calcium oxide are correct? 9701/12 Oct/Nov 2014

36 Which statements about calcium oxide are correct? 1 It reacts with cold water. 2 It is produced when calcium nitrate is heated. 3 It can be reduced by heating with magnesium.

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2014

Q97 · Pieces of calcium and magnesium are reacted separately with cold water 9701/13 Oct/Nov 2014

13 Pieces of calcium and magnesium are reacted separately with cold water. Pieces of calcium and magnesium are also burned separately with oxygen. Which row correctly describes the observations from these reactions? calcium magnesium calcium magnesium with cold water with cold water with oxygen with oxygen A rapid bubbling slow bubbling red flame white flame B rapid bubbling slow bubbling white flame red flame C slow bubbling rapid bubbling red flame white flame D slow bubbling rapid bubbling white flame red flame

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2014

Q98 · X is a mixture of two compounds of Group II elements 9701/13 Oct/Nov 2014

16 X is a mixture of two compounds of Group II elements. X can undergo thermal decomposition to produce a white solid and only two gaseous products. One of the gaseous products relights a glowing splint. What could be the components of mixture X? A MgCl 2 and CaCO3 B MgCO3 and Ca(NO3)2 C Mg(NO3)2 and Ca(NO3)2 D MgO and CaSO4

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2014

Q99 · A student examines two semi-precious stones; one is agate, SiO2, and the other is… 9701/13 Oct/Nov 2014

19 A student examines two semi-precious stones; one is agate, SiO2, and the other is calcite, CaCO3. How could they be distinguished? A Add a fixed amount of cold aqueous sodium hydroxide to each separately and measure any temperature change. B Heat each separately over a gentle Bunsen flame and note which one melts first. C Shake each separately with dilute hydrochloric acid and test any gas formed. D Shake each separately with distilled water and add a few drops of Universal Indicator.

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2014

Q100 · 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

Q101 · 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

Q102 · X is a Group II metal 9701/11 May/June 2015

36 X is a Group II metal. It forms a sulfate which is more soluble than barium sulfate. It forms a hydroxide which is more soluble than calcium hydroxide. What could be the identity of X? 1 strontium 2 magnesium 3 beryllium

1 marks

Answer: D

This question in 9701/11 May/June 2015

Q103 · 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

Q104 · What happens when a piece of magnesium ribbon is placed in cold water? 9701/12 May/June 2015

13 What happens when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly on the magnesium. C The magnesium floats on the surface of the water and reacts quickly. D The magnesium glows and a white solid is produced.

1 marks

Answer: B

This question in 9701/12 May/June 2015

Q105 · Compound X releases carbon dioxide gas and forms a white solid, Y, when it is heated 9701/12 May/June 2015

14 Compound X releases carbon dioxide gas and forms a white solid, Y, when it is heated. Neither X nor Y are soluble in water. Compound Y is used as a refractory kiln lining. What is compound X? A CaCO3 B CaO C MgCO3 D MgO

1 marks

Answer: C

This question in 9701/12 May/June 2015

Q106 · Which property decreases on descending Group II? 9701/12 Oct/Nov 2015

12 Which property decreases on descending Group II? A radius of the cation, M2+ B reactivity of the element with water C shielding of outermost electrons D the ease of thermal decomposition of the carbonates, MCO3

1 marks

This question in 9701/12 Oct/Nov 2015

Q107 · Which statements about calcium and strontium compounds are correct? 9701/12 Oct/Nov 2015

35 Which statements about calcium and strontium compounds are correct? 1 When calcium oxide and strontium oxide are added to water they both produce alkalis. 2 Calcium hydroxide is more soluble than strontium hydroxide. 3 Calcium sulfate is less soluble than strontium sulfate.

1 marks

This question in 9701/12 Oct/Nov 2015

Q108 · When dealing with a spillage of metallic sodium it is important that no toxic or… 9701/12 Feb/March 2016

13 When dealing with a spillage of metallic sodium it is important that no toxic or flammable products are formed. Which material should be used if there is a spillage of metallic sodium? A dilute hydrochloric acid B ethanol C sand D water spray

1 marks

Answer: C

This question in 9701/12 Feb/March 2016

Q109 · River water in a chalky agricultural area contains Ca2+, Mg2+, CO3 2–, HCO3 –, Cl − and… 9701/12 Feb/March 2016

18 River water in a chalky agricultural area contains Ca2+, Mg2+, CO3 2–, HCO3 –, Cl − and NO3 – ions. In a water treatment plant, such water is treated by adding a calculated quantity of calcium hydroxide. What will be precipitated from the river water following the addition of calcium hydroxide? A CaCl 2 B CaCO3 C Ca(NO3)2 D Mg(NO3)2

1 marks

Answer: B

This question in 9701/12 Feb/March 2016

Q110 · A sample containing 0.40 mol of calcium nitrate was decomposed by heating in a roaring… 9701/12 Feb/March 2016

36 A sample containing 0.40 mol of calcium nitrate was decomposed by heating in a roaring Bunsen burner flame until there was no further decomposition. What are the products of this reaction? 1 0.40 mol of calcium oxide 2 0.40 mol of nitrogen, N2(g) 3 0.40 mol of oxygen, O2(g)

1 marks

Answer: D

This question in 9701/12 Feb/March 2016

Q111 · 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

Q112 · X and Y are both Group 2 metals 9701/11 May/June 2016

14 X and Y are both Group 2 metals. X and Y both form hydroxide compounds, but X(OH)2 is more soluble in water than Y(OH)2. If a piece of metal Y is put into cold water a very slow reaction occurs, and only a very few, small hydrogen bubbles can be seen. What could be the identities of X and Y? X Y A barium magnesium B barium strontium C calcium strontium D magnesium calcium

1 marks

Answer: A

This question in 9701/11 May/June 2016

Q113 · In some areas lime, Ca(OH)2, is added to soil to improve crop growth 9701/11 May/June 2016

16 In some areas lime, Ca(OH)2, is added to soil to improve crop growth. Which statement correctly describes a reason why lime improves crop growth? A Lime acts as a catalyst which speeds up the release of nitrates into the soil. B Lime is an effective pesticide and protects the plants from damage. C Lime is used to reduce the acidity of the soil. D Lime lowers the pH of the soil.

1 marks

Answer: C

This question in 9701/11 May/June 2016

Q114 · Solutions of Mg(NO3)2 and Ba(NO3)2 separately undergo a series of reactions 9701/13 May/June 2016

14 Solutions of Mg(NO3)2 and Ba(NO3)2 separately undergo a series of reactions. sodium carbonate excess excess solution HCl (aq) NaOH(aq) Mg(NO3)2(aq) M N P sodium carbonate excess excess solution HCl (aq) NaOH(aq) Ba(NO3)2(aq) Q R S M, N and P are magnesium compounds. Q, R and S are barium compounds. How many of M, N, P, Q, R and S are white precipitates? A 2 B 3 C 4 D 5

1 marks

Answer: B

This question in 9701/13 May/June 2016

Q115 · 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

Q116 · Steam is passed over heated magnesium to give compound J and hydrogen 9701/13 May/June 2016

16 Steam is passed over heated magnesium to give compound J and hydrogen. What is not a property of compound J? A It has an Mr of 40.3. B It is basic. C It is a white solid. D It is very soluble in water.

1 marks

Answer: D

This question in 9701/13 May/June 2016

Q117 · 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

Q118 · Compound T is a white crystalline solid 9701/11 Oct/Nov 2016

17 Compound T is a white crystalline solid. When a sample of T was mixed with aqueous sodium hydroxide and heated, a pungent smelling gas was produced which turned damp red litmus paper blue. This same gas produced dense white smoke with hydrogen chloride gas. Further testing of a solution of T with barium chloride solution produced a dense white precipitate which did not dissolve when dilute hydrochloric acid was added to the mixture. What is the identity of compound T? A ammonium carbonate B ammonium sulfate C sodium carbonate D sodium sulfate

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2016

Q119 · Which row of the table gives correct comparisons between the solubilities of calcium and… 9701/11 Oct/Nov 2016

18 Which row of the table gives correct comparisons between the solubilities of calcium and barium hydroxide and the thermal stabilities of calcium and barium carbonate? solubility thermal stability calcium hydroxide barium hydroxide calcium carbonate barium carbonate A higher lower higher lower B higher lower lower higher C lower higher higher lower D lower higher lower higher

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2016

Q120 · 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

Q121 · Which row of the table gives correct comparisons between the solubilities of calcium and… 9701/13 Oct/Nov 2016

18 Which row of the table gives correct comparisons between the solubilities of calcium and barium hydroxide and the thermal stabilities of calcium and barium carbonate? solubility thermal stability calcium hydroxide barium hydroxide calcium carbonate barium carbonate A higher lower higher lower B higher lower lower higher C lower higher higher lower D lower higher lower higher

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2016

Q122 · Trends are seen in the physical and chemical properties of the elements of Group 2 and… 9701/12 May/June 2017

14 Trends are seen in the physical and chemical properties of the elements of Group 2 and their compounds. Which property shows a decrease from magnesium to barium? A the rate of the reaction between the element and dilute hydrochloric acid B the solubility of the hydroxides C the solubility of the sulfates D the temperature of decomposition of the carbonates

1 marks

Answer: C

This question in 9701/12 May/June 2017

Q123 · Calcium oxide is added to water and the resulting mixture is filtered 9701/12 May/June 2017

15 Calcium oxide is added to water and the resulting mixture is filtered. This filtrate is X. When carbon dioxide is bubbled through filtrate X, a white precipitate is formed. Which equation for this reaction of filtrate X with carbon dioxide is correct? A CaO + CO2 → CaCO3 B Ca(OH)2 + CO2 → CaO + H2CO3 C 2CaO + H2O + CO2 → CaCO3 + Ca(OH)2 D Ca(OH)2 + CO2 → CaCO3 + H2O

1 marks

Answer: D

This question in 9701/12 May/June 2017

Q124 · The table gives information about calcium carbonate and calcium hydroxide 9701/13 May/June 2017

14 The table gives information about calcium carbonate and calcium hydroxide. Which row is correct? calcium hydroxide calcium carbonate can be manufactured is more soluble than using calcium calcium hydroxide carbonate as a starting material A no no B no yes C yes no D yes yes

1 marks

Answer: B

This question in 9701/13 May/June 2017

Q125 · Which row correctly describes the reactions of calcium and strontium with water? 9701/13 May/June 2017

15 Which row correctly describes the reactions of calcium and strontium with water? substance reduced substance oxidised more vigorous reaction A calcium or strontium water calcium + water B calcium or strontium water strontium + water C water calcium or strontium calcium + water D water calcium or strontium strontium + water

1 marks

Answer: D

This question in 9701/13 May/June 2017

Q126 · Which compound would most usually be added to soil to reduce its acidity? 9701/11 Oct/Nov 2017

14 Which compound would most usually be added to soil to reduce its acidity? A aluminium hydroxide B calcium hydroxide C magnesium hydroxide D sodium hydroxide

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2017

Q127 · The mineral dolomite is a mixture of magnesium carbonate and calcium carbonate 9701/11 Oct/Nov 2017

15 The mineral dolomite is a mixture of magnesium carbonate and calcium carbonate. An aqueous reagent, X, was added to a small sample of dolomite. Effervescence was seen and a white solid, Y, was formed. What could be the correct identity of reagent X and solid Y? reagent X solid Y A hydrochloric acid calcium chloride B hydrochloric acid magnesium chloride C sulfuric acid calcium sulfate D sulfuric acid magnesium sulfate

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2017

Q128 · Which statements about the elements barium and calcium and their compounds are correct? 9701/11 Oct/Nov 2017

35 Which statements about the elements barium and calcium and their compounds are correct? 1 Barium nitrate decomposes at a higher temperature than calcium nitrate. 2 Barium hydroxide is more soluble in water than is calcium hydroxide. 3 Calcium is more reactive with water than is barium.

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2017

Q129 · Radium is an element below barium in Group 2 of the Periodic Table 9701/12 Oct/Nov 2017

14 Radium is an element below barium in Group 2 of the Periodic Table. Which equation shows what happens when solid radium nitrate, Ra(NO3)2, is heated strongly? A Ra(NO3)2(s) → RaO(s) + N2O(g) + 2O2(g) B 2Ra(NO3)2(s) → 2RaO(s) + 2N2(g) + 5O2(g) C 2Ra(NO3)2(s) → 2RaO(s) + 4NO2(g) + O2(g) D 4Ra(NO3)2(s) → 2Ra2O(s) + 8NO2(g) + 3O2(g)

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2017

Q130 · 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

Q131 · X is a mixture of two compounds of Group 2 elements 9701/12 Oct/Nov 2017

19 X is a mixture of two compounds of Group 2 elements. X undergoes thermal decomposition to produce a white solid and only two gaseous products. One of the gaseous products relights a glowing splint. What could be the components of mixture X? A MgCl 2 and CaCO3 B MgCO3 and Ca(NO3)2 C Mg(NO3)2 and Ca(NO3)2 D MgO and CaO

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2017

Q132 · Which statements correctly describe a trend on going down Group 2? 9701/12 Oct/Nov 2017

35 Which statements correctly describe a trend on going down Group 2? 1 Reactivity of the elements increases. 2 First ionisation energy of the elements decreases. 3 The hydroxides become more soluble in water.

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2017

Q133 · Which compound would most usually be added to soil to reduce its acidity? 9701/13 Oct/Nov 2017

14 Which compound would most usually be added to soil to reduce its acidity? A aluminium hydroxide B calcium hydroxide C magnesium hydroxide D sodium hydroxide

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2017

Q134 · The mineral dolomite is a mixture of magnesium carbonate and calcium carbonate 9701/13 Oct/Nov 2017

15 The mineral dolomite is a mixture of magnesium carbonate and calcium carbonate. An aqueous reagent, X, was added to a small sample of dolomite. Effervescence was seen and a white solid, Y, was formed. What could be the correct identity of reagent X and solid Y? reagent X solid Y A hydrochloric acid calcium chloride B hydrochloric acid magnesium chloride C sulfuric acid calcium sulfate D sulfuric acid magnesium sulfate

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2017

Q135 · Which statements about the elements barium and calcium and their compounds are correct? 9701/13 Oct/Nov 2017

35 Which statements about the elements barium and calcium and their compounds are correct? 1 Barium nitrate decomposes at a higher temperature than calcium nitrate. 2 Barium hydroxide is more soluble in water than is calcium hydroxide. 3 Calcium is more reactive with water than is barium.

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2017

Q136 · 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

Q137 · Which row correctly describes one property of barium and one property of barium oxide? 9701/11 May/June 2018

19 Which row correctly describes one property of barium and one property of barium oxide? observation when pH of solution obtained when barium metal is a spatula measure of BaO is added to water added to 100 cm3 of water A a few gas bubbles 8 form on the metal surface B a few gas bubbles 13 form on the metal surface C rapid effervescence is seen 8 D rapid effervescence is seen 13

1 marks

Answer: D

This question in 9701/11 May/June 2018

Q138 · 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

Q139 · In Group 2 of the Periodic Table, the properties of the elements and their compounds show… 9701/12 May/June 2018

16 In Group 2 of the Periodic Table, the properties of the elements and their compounds show regular change down the group. Which property shows a decrease from magnesium to barium? A the decomposition temperature of the carbonates B the decomposition temperature of the nitrates C the solubility of the hydroxides D the solubility of the sulfates

1 marks

Answer: D

This question in 9701/12 May/June 2018

Q140 · Solid barium oxide is added to some ammonium sulfate solution in a test-tube and the… 9701/12 May/June 2018

36 Solid barium oxide is added to some ammonium sulfate solution in a test-tube and the mixture is warmed. A piece of damp red litmus paper is held over the mouth of the test-tube. Which observations would be made? 1 The damp litmus paper initially turns from red to blue. 2 A white precipitate forms in the test-tube. 3 A brown gas is evolved with strong heating.

1 marks

Answer: B

This question in 9701/12 May/June 2018

Q141 · An ore contains magnesium carbonate and barium carbonate 9701/13 May/June 2018

14 An ore contains magnesium carbonate and barium carbonate. A sample of the ore is dissolved in nitric acid. How could this solution be processed into a magnesium compound and a separate barium compound? A Add HCl (aq), filter off the solid barium chloride. B Add HCl (aq), filter off the solid magnesium chloride. C Add H2SO4(aq), filter off the solid barium sulfate. D Add H2SO4(aq), filter off the solid magnesium sulfate.

1 marks

Answer: C

This question in 9701/13 May/June 2018

Q142 · When calcium and calcium hydride, CaH2, react separately with water, they each produce a… 9701/13 May/June 2018

15 When calcium and calcium hydride, CaH2, react separately with water, they each produce a white solid and a colourless gas. The white solid is the same compound in each reaction. Which statement is correct? A Both Ca and CaH2 produce H2. B Both Ca and CaH2 produce O2. C Ca produces H2 and CaH2 produces O2. D Ca produces O2 and CaH2 produces H2.

1 marks

Answer: A

This question in 9701/13 May/June 2018

Q143 · Which statements are correct? 9701/13 May/June 2018

32 Which statements are correct? 1 Magnesium carbonate decomposes at a lower temperature than calcium carbonate. 2 Calcium hydroxide is more soluble in water than magnesium hydroxide. 3 Calcium is a stronger reducing agent than magnesium.

1 marks

Answer: A

This question in 9701/13 May/June 2018

Q144 · 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

Q145 · In which row are all statements comparing magnesium and barium correct? 9701/12 Oct/Nov 2018

15 In which row are all statements comparing magnesium and barium correct? fourth ionisation energy reaction with water magnesium barium magnesium barium A higher lower faster slower B higher lower slower faster C lower higher faster slower D lower higher slower faster

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2018

Q146 · Which statements concerning calcium hydroxide are correct? 9701/12 Oct/Nov 2018

36 Which statements concerning calcium hydroxide are correct? 1 It is less soluble in water than strontium hydroxide. 2 When it is added to water an alkaline solution is formed. 3 It is used in agriculture to lower soil pH.

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2018

Q147 · 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

Q148 · A sample of anhydrous calcium nitrate is placed in a test-tube and heated in a roaring… 9701/13 Oct/Nov 2018

15 A sample of anhydrous calcium nitrate is placed in a test-tube and heated in a roaring Bunsen flame until it decomposes. The description of the gas in the test-tube is then noted. A glowing splint is then put into the test-tube and any changes are noted. Which observations are correct? description of the result of gas in the test-tube glowing splint test A brown the splint goes out B brown the splint relights C colourless the splint goes out D colourless the splint relights

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2018

Q149 · Which statement explains the observation that magnesium hydroxide dissolves in aqueous… 9701/13 Oct/Nov 2018

18 Which statement explains the observation that magnesium hydroxide dissolves in aqueous ammonium chloride, but not in aqueous sodium chloride? A The ionic radius of the NH4 + ion is similar to that of Mg2+ but not that of Na+. B NH4Cl dissociates less fully than NaCl. C The Na+ and Mg2+ ions have the same number of electrons. D The NH4 + ion can donate a proton.

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2018

Q150 · Which reaction routes can be used to make a pure sample of barium sulfate? 9701/13 Oct/Nov 2018

35 Which reaction routes can be used to make a pure sample of barium sulfate? heat dilute dilute filter, wash 1 Ba metal product product 2 product 3 in O2 HCl H2SO4 and dry strong solid an excess dilute filter, wash 2 Ba(NO3)2 product 2 product 3 heat in air product of water H2SO4 and dry dilute dilute filter, wash 3 Ba(OH)2 product product 2 HNO3 H2SO4 and dry

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2018

Q151 · Which properties increase from magnesium to barium? 9701/13 Oct/Nov 2018

36 Which properties increase from magnesium to barium? 1 ionic radius of the cation M2+ 2 screening of outermost electrons by inner shells 3 solubility of the hydroxides, M(OH)2, in water

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2018

Q152 · Metal T reacts with water to produce a colourless solution 9701/12 Feb/March 2019

14 Metal T reacts with water to produce a colourless solution. A white precipitate is produced when this colourless solution is mixed with aqueous sulfuric acid. What is metal T? A barium B magnesium C potassium D sodium

1 marks

Answer: A

This question in 9701/12 Feb/March 2019

Q153 · 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

Q154 · L, M and N are Group 2 metals 9701/12 Feb/March 2019

16 L, M and N are Group 2 metals. L reacts more vigorously with dilute hydrochloric acid than N does. M(OH)2 is more soluble than N(OH)2. What could be the identities of L, M and N? L M N A Ba Ca Sr B Ba Sr Ca C Ca Ba Sr D Sr Ca Ba

1 marks

Answer: B

This question in 9701/12 Feb/March 2019

Q155 · Substance X reacts with water 9701/11 May/June 2019

14 Substance X reacts with water. A gas is given off and the pH of the solution increases. The solution is then reacted with sulfuric acid and a white precipitate forms. What could be substance X? A barium B barium oxide C magnesium D magnesium oxide

1 marks

Answer: A

This question in 9701/11 May/June 2019

Q156 · Solutions of 0.1 mol dm–3 Mg(NO3)2 and 0.1 mol dm–3 Ba(NO3)2 separately undergo a series… 9701/11 May/June 2019

15 Solutions of 0.1 mol dm–3 Mg(NO3)2 and 0.1 mol dm–3 Ba(NO3)2 separately undergo a series of reactions using pure reagents. sodium carbonate excess HCl (aq) excess solution then boil NaOH(aq) Mg(NO3)2(aq) M N P sodium carbonate excess HCl (aq) excess solution then boil NaOH(aq) Ba(NO3)2(aq) Q R S M, N and P are magnesium compounds. Q, R and S are barium compounds. How many of M, N, P, Q, R and S are white precipitates? A 2 B 3 C 4 D 5

1 marks

Answer: B

This question in 9701/11 May/June 2019

Q157 · A mixture of magnesium carbonate and magnesium nitrate is heated strongly in a hard-glass… 9701/11 May/June 2019

36 A mixture of magnesium carbonate and magnesium nitrate is heated strongly in a hard-glass test-tube. Which gases are formed? 1 carbon dioxide 2 nitrogen dioxide 3 oxygen

1 marks

Answer: A

This question in 9701/11 May/June 2019

Q158 · How many of the solutions shown, when added to separate portions of magnesium sulfate… 9701/12 May/June 2019

15 How many of the solutions shown, when added to separate portions of magnesium sulfate solution, produce a white precipitate? HCl (aq) NH3(aq) (NH4)2CO3(aq) Ba(NO3)2(aq) A 0 B 1 C 2 D 3

1 marks

Answer: D

This question in 9701/12 May/June 2019

Q159 · A white solid, Z, is soluble in water 9701/12 May/June 2019

16 A white solid, Z, is soluble in water. A sample of Z is heated with a Bunsen burner until there is no further change. When the residue is shaken with water a solution is formed with no solid remaining. What could Z be? A MgCO3 B Mg(NO3)2 C BaCO3 D Ba(NO3)2

1 marks

Answer: D

This question in 9701/12 May/June 2019

Q160 · Which reactions involving calcium and its compounds produce two gaseous products? 9701/12 May/June 2019

35 Which reactions involving calcium and its compounds produce two gaseous products? 1 heating solid anhydrous calcium nitrate 2 heating solid anhydrous calcium carbonate 3 adding calcium metal to water

1 marks

Answer: D

This question in 9701/12 May/June 2019

Q161 · Dilute hydrochloric acid is added to solid barium carbonate and solid magnesium carbonate… 9701/13 May/June 2019

14 Dilute hydrochloric acid is added to solid barium carbonate and solid magnesium carbonate in separate test-tubes. Dilute sodium hydroxide is added to 0.1 mol dm–3 barium chloride and 0.1 mol dm–3 magnesium chloride in separate test-tubes. Which row is correct? BaCO3(s) BaCl 2(aq) MgCO3(s) MgCl 2(aq) + HCl (aq) + NaOH(aq) + HCl (aq) + NaOH(aq) A no change white ppt no change no change B effervescence no change effervescence no change C effervescence no change effervescence white ppt D effervescence white ppt effervescence white ppt

1 marks

Answer: C

This question in 9701/13 May/June 2019

Q162 · River water in an agricultural area contains NH4 +, CO3 2–, HCO3 –, Cl − and NO3 – ions 9701/13 May/June 2019

15 River water in an agricultural area contains NH4 +, CO3 2–, HCO3 –, Cl − and NO3 – ions. In a water treatment plant, this water is treated by adding a calculated quantity of calcium hydroxide. What is precipitated from the river water when calcium hydroxide is added? A CaCl 2 B CaCO3 C Ca(NO3)2 D NH4OH

1 marks

Answer: B

This question in 9701/13 May/June 2019

Q163 · 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

Q164 · Solutions P and Q each contain a different Group 2 ion at the same concentration 9701/11 Oct/Nov 2019

15 Solutions P and Q each contain a different Group 2 ion at the same concentration. One contains Mg2+, the other contains Ba2+. Tests are carried out on separate 5 cm3 samples of P and Q. test 1: add 1 cm3 of 0.1 mol dm–3 Na2SO4(aq) test 2: add 1 cm3 of 0.1 mol dm–3 NaOH(aq) What are the results of these tests? results in test 1 results in test 2 A more precipitate with Ba2+ more precipitate with Ba2+ B more precipitate with Ba2+ more precipitate with Mg2+ C more precipitate with Mg2+ more precipitate with Ba2+ D more precipitate with Mg2+ more precipitate with Mg2+

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2019

Q165 · Which statement about the compounds of Group 2 elements magnesium to barium is correct? 9701/12 Oct/Nov 2019

13 Which statement about the compounds of Group 2 elements magnesium to barium is correct? A Carbonates of Group 2 elements produce bubbles when added to dilute nitric acid. B Nitrates of Group 2 elements produce nitrogen and oxygen on heating. C Oxides of Group 2 elements produce bubbles when added to dilute hydrochloric acid. D The oxides of Group 2 elements are amphoteric.

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2019

Q166 · When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are… 9701/12 Oct/Nov 2019

14 When equal volumes of saturated solutions of barium hydroxide and calcium hydroxide are mixed, a white precipitate, Y, forms. The mixture is filtered and carbon dioxide is bubbled through the filtrate, producing a second white precipitate, Z. What are Y and Z? Y Z A Ba(OH)2 Ca(OH)2 B Ba(OH)2 CaCO3 C Ca(OH)2 BaCO3 D Ca(OH)2 Ba(OH)2

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2019

Q167 · 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

Q168 · Solutions P and Q each contain a different Group 2 ion at the same concentration 9701/13 Oct/Nov 2019

15 Solutions P and Q each contain a different Group 2 ion at the same concentration. One contains Mg2+, the other contains Ba2+. Tests are carried out on separate 5 cm3 samples of P and Q. test 1: add 1 cm3 of 0.1 mol dm–3 Na2SO4(aq) test 2: add 1 cm3 of 0.1 mol dm–3 NaOH(aq) What are the results of these tests? results in test 1 results in test 2 A more precipitate with Ba2+ more precipitate with Ba2+ B more precipitate with Ba2+ more precipitate with Mg2+ C more precipitate with Mg2+ more precipitate with Ba2+ D more precipitate with Mg2+ more precipitate with Mg2+

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2019

Q169 · Compound Z is insoluble in water but soluble at low pH 9701/12 Feb/March 2020

13 Compound Z is insoluble in water but soluble at low pH. What could be compound Z? A barium carbonate B barium chloride C barium hydroxide D barium sulfate

1 marks

Answer: A

This question in 9701/12 Feb/March 2020

Q170 · A student investigates calcium nitrate crystals by heating them in the apparatus shown 9701/12 Feb/March 2020

17 A student investigates calcium nitrate crystals by heating them in the apparatus shown. A colourless gas leaves the apparatus at Y. A flame is held to this gas. lighted splint Y calcium nitrate crystals heat water with a few drops of litmus Which observations would the student make? litmus solution flame at Y A changes to blue flame burns more brightly B changes to blue flame goes out C changes to red flame burns more brightly D changes to red flame goes out

1 marks

Answer: C

This question in 9701/12 Feb/March 2020

Q171 · An excess of MgO is shaken with water 9701/11 May/June 2020

14 An excess of MgO is shaken with water. The resulting mixture is filtered into test-tube P. An excess of BaO is shaken with water. The resulting mixture is filtered into test-tube Q. Which oxide reacts more readily with water and which filtrate has the lower pH? oxide reacts more test-tube with readily with water filtrate of lower pH A BaO P B BaO Q C MgO P D MgO Q

1 marks

Answer: A

This question in 9701/11 May/June 2020

Q172 · 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

Q173 · 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

Q174 · Which property shows an increase from magnesium to barium? 9701/12 May/June 2020

17 Which property shows an increase from magnesium to barium? A the first ionisation energy of the elements B the oxidising power of the metals C the solubility of the hydroxides D the solubility of the sulfates

1 marks

Answer: C

This question in 9701/12 May/June 2020

Q175 · Compound T is a white crystalline solid 9701/13 May/June 2020

12 Compound T is a white crystalline solid. When a sample of compound T is mixed with aqueous sodium hydroxide and heated, a gas is produced which turns damp red litmus paper blue. Further testing of a solution of compound T with aqueous barium chloride produces a dense white precipitate which does not dissolve when dilute hydrochloric acid is added to the mixture. What is the identity of compound T? A ammonium carbonate B ammonium sulfate C sodium carbonate D sodium sulfate

1 marks

Answer: B

This question in 9701/13 May/June 2020

Q176 · The statements apply to the elements in Group 2 9701/13 May/June 2020

14 The statements apply to the elements in Group 2. Which statement is correct? A As atomic number increases, ionic radius increases. B As atomic number increases, reducing ability decreases. C As atomic number increases, first ionisation energy increases. D As atomic radius increases, first ionisation energy increases.

1 marks

Answer: A

This question in 9701/13 May/June 2020

Q177 · Which property shows an increase from calcium to barium going down Group 2? 9701/13 May/June 2020

18 Which property shows an increase from calcium to barium going down Group 2? A the ease of decomposition of the carbonates B the solubility of the hydroxides C the solubility of the sulfates D the volume of hydrogen given off when 1 g of the metal reacts with water

1 marks

Answer: B

This question in 9701/13 May/June 2020

Q178 · Strontium nitrate is heated strongly for several minutes 9701/13 May/June 2020

35 Strontium nitrate is heated strongly for several minutes. Which statements are correct? 1 A brown gas is produced. 2 A gas is produced that relights a glowing splint. 3 A white powder remains after heating.

1 marks

Answer: A

This question in 9701/13 May/June 2020

Q179 · This question is about two elements in Group 2, Q and R 9701/11 Oct/Nov 2020

13 This question is about two elements in Group 2, Q and R. Three of the statements shown are correct for metal Q. The one remaining statement is correct for metal R. Which statement applies to R? A A saturated solution of the hydroxide of this metal has the higher pH value. B This metal has a carbonate that is used in agriculture to reduce the acidity of soil. C This metal has the greater atomic radius. D This metal reacts more quickly with cold water.

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2020

Q180 · A student mixes pairs of chemicals together in separate test-tubes 9701/11 Oct/Nov 2020

15 A student mixes pairs of chemicals together in separate test-tubes. ● excess calcium (s) + water (l) ● barium chloride (aq) + strontium hydroxide (aq) ● calcium carbonate (s) + excess hydrochloric acid (aq) ● magnesium sulfate (aq) + barium nitrate (aq) How many of the mixtures produce a white, solid product? A 0 B 1 C 2 D 3

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2020

Q181 · What are the trends in the stated properties as Group 2 is descended from magnesium to… 9701/11 Oct/Nov 2020

18 What are the trends in the stated properties as Group 2 is descended from magnesium to barium? decomposition temperature of the first ionisation energy carbonate A decreases increases B decreases decreases C increases increases D increases decreases

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2020

Q182 · Sulfur dioxide, SO2, reacts with calcium hydroxide in aqueous solution 9701/11 Oct/Nov 2020

19 Sulfur dioxide, SO2, reacts with calcium hydroxide in aqueous solution. What is the main product that is first formed? A Ca(HSO4)2 B CaS C CaSO3 D CaSO4

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2020

Q183 · This question is about two elements in Group 2, Q and R 9701/13 Oct/Nov 2020

13 This question is about two elements in Group 2, Q and R. Three of the statements shown are correct for metal Q. The one remaining statement is correct for metal R. Which statement applies to R? A A saturated solution of the hydroxide of this metal has the higher pH value. B This metal has a carbonate that is used in agriculture to reduce the acidity of soil. C This metal has the greater atomic radius. D This metal reacts more quickly with cold water.

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2020

Q184 · A student mixes pairs of chemicals together in separate test-tubes 9701/13 Oct/Nov 2020

15 A student mixes pairs of chemicals together in separate test-tubes. ● excess calcium (s) + water (l) ● barium chloride (aq) + strontium hydroxide (aq) ● calcium carbonate (s) + excess hydrochloric acid (aq) ● magnesium sulfate (aq) + barium nitrate (aq) How many of the mixtures produce a white, solid product? A 0 B 1 C 2 D 3

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2020

Q185 · What are the trends in the stated properties as Group 2 is descended from magnesium to… 9701/13 Oct/Nov 2020

18 What are the trends in the stated properties as Group 2 is descended from magnesium to barium? decomposition temperature of the first ionisation energy carbonate A decreases increases B decreases decreases C increases increases D increases decreases

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2020

Q186 · Sulfur dioxide, SO2, reacts with calcium hydroxide in aqueous solution 9701/13 Oct/Nov 2020

19 Sulfur dioxide, SO2, reacts with calcium hydroxide in aqueous solution. What is the main product that is first formed? A Ca(HSO4)2 B CaS C CaSO3 D CaSO4

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2020

Q187 · Which row correctly describes one property of barium and one property of barium oxide? 9701/12 Feb/March 2021

14 Which row correctly describes one property of barium and one property of barium oxide? observation when pH of solution obtained when barium metal is a spatula measure of BaO is added to water added to 100 cm3 of water A a few gas bubbles 8 form on the metal surface B a few gas bubbles 13 form on the metal surface C rapid effervescence is seen 8 D rapid effervescence is seen 13

1 marks

Answer: D

This question in 9701/12 Feb/March 2021

Q188 · An anhydrous white salt, Z, is heated strongly for 30 minutes 9701/12 Feb/March 2021

15 An anhydrous white salt, Z, is heated strongly for 30 minutes. A mixture of gases is given off. The solid remaining in the test-tube is then dissolved in a small volume of dilute hydrochloric acid. The addition of a few drops of dilute sulfuric acid to the test-tube causes a white precipitate to form. Which substance could be Z? A barium carbonate B barium nitrate C magnesium carbonate D magnesium nitrate

1 marks

Answer: B

This question in 9701/12 Feb/March 2021

Q189 · Q is a mixture of a Group 2 oxide and a Group 2 sulfate 9701/11 May/June 2021

14 Q is a mixture of a Group 2 oxide and a Group 2 sulfate. Q contains equal amounts of the two compounds. Q is shaken with water and the resulting mixture filtered; a solid residue is obtained. There is no reaction when the solid residue is shaken with HCl (aq). Shaking the filtrate with H2SO4(aq) produces a white precipitate. What could be Q? A BaO + BaSO4 B BaO + MgSO4 C MgO + BaSO4 D MgO + MgSO4

1 marks

Answer: A

This question in 9701/11 May/June 2021

Q190 · Which substance will not be a product of the thermal decomposition of hydrated magnesium… 9701/11 May/June 2021

15 Which substance will not be a product of the thermal decomposition of hydrated magnesium nitrate? A dinitrogen monoxide B magnesium oxide C oxygen D steam

1 marks

Answer: A

This question in 9701/11 May/June 2021

Q191 · Which statements are correct? 9701/11 May/June 2021

36 Which statements are correct? 1 Magnesium carbonate decomposes at a lower temperature than calcium carbonate. 2 Calcium hydroxide is more soluble in water than magnesium hydroxide. 3 Calcium is a stronger reducing agent than magnesium.

1 marks

Answer: A

This question in 9701/11 May/June 2021

Q192 · A farmer requires a solid compound to raise the pH of the soil in a field from 5.5 to… 9701/12 May/June 2021

14 A farmer requires a solid compound to raise the pH of the soil in a field from 5.5 to above 6.0. Which compound could the farmer use? A (NH4)2SO4 B NH4NO3 C Ca(OH)2 D Ca(NO3)2

1 marks

Answer: C

This question in 9701/12 May/June 2021

Q193 · Z is an anhydrous compound of a Group 2 element 9701/12 May/June 2021

15 Z is an anhydrous compound of a Group 2 element. When it is heated, Z undergoes thermal decomposition to produce two different gases. Z has relatively low thermal stability compared to other Group 2 compounds containing the same anion as Z. What is compound Z? A barium carbonate B barium nitrate C magnesium carbonate D magnesium nitrate

1 marks

Answer: D

This question in 9701/12 May/June 2021

Q194 · Which reaction routes can be used to make a pure sample of barium sulfate? 9701/12 May/June 2021

36 Which reaction routes can be used to make a pure sample of barium sulfate? heat dilute dilute filter, wash 1 Ba product product product in O2 HCl H2SO4 and dry strong solid an excess dilute filter, wash 2 Ba(NO3)2 product product heat in air product of water H2SO4 and dry dilute dilute filter, wash 3 Ba(OH)2 product product HNO3 H2SO4 and dry

1 marks

Answer: A

This question in 9701/12 May/June 2021

Q195 · Which statement is correct? 9701/13 May/June 2021

17 Which statement is correct? A Doctors can use the very insoluble MgSO4 to investigate the digestive system. B Farmers can lower the pH of soil by spreading CaCO3 on it. C Students can test a solution for SO4 2– ions by using Ba(NO3)2(aq) followed by HNO3(aq). D The insoluble hydroxide, Ba(OH)2, can be safely used to lower the acidity of the stomach.

1 marks

Answer: C

This question in 9701/13 May/June 2021

Q196 · A solid, X, was placed in an excess of the liquid Y 9701/13 May/June 2021

18 A solid, X, was placed in an excess of the liquid Y. A colourless gas was given off and a white precipitate was seen. The precipitate was not X. What could be the identities of X and Y? X Y A BaCO3 H2O B Ca dilute H2SO4 C Mg dilute H2SO4 D SrCO3 dilute HCl

1 marks

Answer: B

This question in 9701/13 May/June 2021

Q197 · In which list are all three compounds soluble in water? 9701/11 Oct/Nov 2021

14 In which list are all three compounds soluble in water? A barium chloride, calcium carbonate, magnesium hydroxide B barium hydroxide, calcium hydroxide, strontium carbonate C barium chloride, barium hydroxide, magnesium sulfate D barium sulfate, calcium sulfate, magnesium hydroxide

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2021

Q198 · 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

Q199 · Which statements about calcium oxide are correct? 9701/11 Oct/Nov 2021

36 Which statements about calcium oxide are correct? 1 It can be reduced by heating with magnesium. 2 It is produced when calcium nitrate is heated. 3 It reacts with cold water.

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2021

Q200 · Which statement about the compounds of the Group 2 metals is correct? 9701/12 Oct/Nov 2021

13 Which statement about the compounds of the Group 2 metals is correct? A Barium carbonate is less thermally stable than strontium carbonate. B Barium sulfate is less soluble than magnesium sulfate. C Calcium hydroxide is less soluble than magnesium hydroxide. D Calcium nitrate is more thermally stable than strontium nitrate.

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2021

Q201 · 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

Q202 · X is the ion of a metal which burns with a red flame 9701/12 Oct/Nov 2021

17 X is the ion of a metal which burns with a red flame. Y is an ion that reacts with concentrated H2SO4 to produce H2S. What could be the formula of a compound containing X and Y? A BaBr2 B BaI2 C SrBr2 D SrI2

1 marks

Answer: D

This question in 9701/12 Oct/Nov 2021

Q203 · In separate experiments, 5.0 g samples of each of four s-block metals are added to an… 9701/11 May/June 2022

3 In separate experiments, 5.0 g samples of each of four s-block metals are added to an excess of water. The gas evolved is collected and its volume measured under the same conditions of temperature and pressure for each sample. Which metal produces the largest volume of gas? A calcium B potassium C rubidium D strontium

1 marks

Answer: A

This question in 9701/11 May/June 2022

Q204 · A mixture contains magnesium carbonate and barium carbonate only 9701/11 May/June 2022

20 A mixture contains magnesium carbonate and barium carbonate only. A sample of the mixture is dissolved in nitric acid to produce a solution. How could this solution be processed into a magnesium compound and a separate barium compound? A Add HCl (aq), filter off the solid barium chloride. B Add HCl (aq), filter off the solid magnesium chloride. C Add H2SO4(aq), filter off the solid barium sulfate. D Add H2SO4(aq), filter off the solid magnesium sulfate.

1 marks

Answer: C

This question in 9701/11 May/June 2022

Q205 · A sample of magnesium nitrate is heated in the apparatus shown 9701/11 May/June 2022

21 A sample of magnesium nitrate is heated in the apparatus shown. gas collected magnesium nitrate trough water heat The pH of the solution in the trough is measured. The gas collected is tested with a glowing splint. What are the results? pH of solution splint test in trough A 8 relights B 2 relights C 8 extinguished D 2 extinguished

1 marks

Answer: B

This question in 9701/11 May/June 2022

Q206 · NH3(aq) is added to separate samples of NaCl (aq), MgCl 2(aq), BaCl 2(aq) and SiCl 4(l) 9701/12 May/June 2022

17 NH3(aq) is added to separate samples of NaCl (aq), MgCl 2(aq), BaCl 2(aq) and SiCl 4(l). Under the conditions of this experiment, only two samples will produce a white precipitate when NH3(aq) is added. What are these two samples? A MgCl 2(aq) and BaCl 2(aq) B MgCl 2(aq) and SiCl 4(l) C NaCl (aq) and BaCl 2(aq) D NaCl (aq) and SiCl 4(l)

1 marks

Answer: B

This question in 9701/12 May/June 2022

Q207 · The table gives information about calcium carbonate and calcium hydroxide 9701/12 May/June 2022

20 The table gives information about calcium carbonate and calcium hydroxide. Which row is correct? calcium hydroxide calcium carbonate is can be manufactured more soluble in water using calcium carbonate than calcium hydroxide as a starting material A no no B no yes C yes no D yes yes

1 marks

Answer: B

This question in 9701/12 May/June 2022

Q208 · Q is a Group 2 metal 9701/12 May/June 2022

21 Q is a Group 2 metal. An excess of QCO3(s) is added to H2SO4(aq) followed by filtration. A sample of QSO4 is then obtained by evaporation of the filtrate. What could be the identity of Q? A barium, calcium or magnesium B barium or calcium only C calcium only D calcium or magnesium only

1 marks

Answer: D

This question in 9701/12 May/June 2022

Q209 · NaOH(aq) is added to separate samples of magnesium chloride and barium chloride solutions 9701/13 May/June 2022

20 NaOH(aq) is added to separate samples of magnesium chloride and barium chloride solutions. H2SO4(aq) is then added slowly to each reaction mixture until in excess. What is observed at the end of the reaction sequence? MgCl 2(aq) BaCl 2(aq) A colourless solution only colourless solution only B colourless solution only white precipitate C white precipitate colourless solution only D white precipitate white precipitate

1 marks

Answer: B

This question in 9701/13 May/June 2022

Q210 · 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

Q211 · 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

Q212 · The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water 9701/11 Oct/Nov 2022

19 The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the highest pH? A BaO B CaO C MgO D SrO

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2022

Q213 · Which row is correct? 9701/11 Oct/Nov 2022

20 Which row is correct? the temperature needed to the solubility of decompose Group 2 metal nitrates Group 2 sulfates A decreases down the group decreases down the group B decreases down the group increases down the group C increases down the group increases down the group D increases down the group decreases down the group

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2022

Q214 · 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

Q215 · 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

Q216 · In the diagram, each test-tube W, X, Y and Z contains 25 cm3 of a 0.1 mol dm–3 solution… 9701/12 Oct/Nov 2022

20 In the diagram, each test-tube W, X, Y and Z contains 25 cm3 of a 0.1 mol dm–3 solution of a salt. W X Y Z 25 cm3 25 cm3 25 cm3 25 cm3 BaCl 2(aq) MgCl 2(aq) BaCl 2(aq) MgCl 2(aq) To test-tubes W and X, 25 cm3 of 0.1 mol dm–3 NaOH(aq) is added. To test-tubes Y and Z, 25 cm3 of 0.1 mol dm–3 H2SO4(aq) is added. In which of test-tubes W and X does the liquid have the higher pH and which of test-tubes Y and Z has the greater mass of precipitate? greater mass higher pH of precipitate A W Y B W Z C X Y D X Z

1 marks

Answer: A

This question in 9701/12 Oct/Nov 2022

Q217 · R is a solid 9701/12 Oct/Nov 2022

23 R is a solid. R fizzes when hydrochloric acid is added. R reacts with hot aqueous sodium hydroxide, giving off a gas which turns red litmus blue. What is the formula of R? A NH4CO3 B (NH4)2CO3 C (NH4)2HCO3 D (NH4)2SO4

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2022

Q218 · 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

Q219 · The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water 9701/13 Oct/Nov 2022

19 The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water. Which oxide produces the saturated solution with the highest pH? A BaO B CaO C MgO D SrO

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2022

Q220 · Equal volumes of saturated solutions of magnesium hydroxide, calcium hydroxide and… 9701/13 May/June 2023

23 Equal volumes of saturated solutions of magnesium hydroxide, calcium hydroxide and strontium hydroxide are completely neutralised with dilute sulfuric acid. The water is gently evaporated from each of the resulting solutions, leaving the corresponding solid sulfates. These solid sulfates are completely dissolved in the minimum volume of water needed to produce saturated solutions. Which statement about the volumes of water needed to dissolve the sulfates is correct? A The calcium sulfate will require the greatest volume of water. B The magnesium sulfate will require the greatest volume of water. C The strontium sulfate will require the greatest volume of water. D They will all require the same volume of water.

1 marks

Answer: C

This question in 9701/13 May/June 2023

Q221 · Which row correctly describes the separate reactions of calcium and strontium with water? 9701/11 Oct/Nov 2023

19 Which row correctly describes the separate reactions of calcium and strontium with water? substance reduced substance oxidised more vigorous reaction A calcium or strontium water calcium + water B calcium or strontium water strontium + water C water calcium or strontium calcium + water D water calcium or strontium strontium + water

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2023

Q222 · L and M are both compounds of Group 2 elements 9701/11 Oct/Nov 2023

20 L and M are both compounds of Group 2 elements. L and M are both soluble in water. When solutions of L and M are mixed, a white precipitate is formed. What could be L and M? A barium chloride and magnesium sulfate B barium sulfate and magnesium chloride C barium nitrate and magnesium chloride D barium carbonate and magnesium nitrate

1 marks

Answer: A

This question in 9701/11 Oct/Nov 2023

Q223 · 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

Q224 · What happens when a piece of magnesium ribbon is placed in cold water? 9701/12 Oct/Nov 2023

21 What happens when a piece of magnesium ribbon is placed in cold water? A A vigorous effervescence occurs. B Bubbles of gas form slowly on the magnesium. C The magnesium floats on the surface of the water and reacts quickly. D The magnesium glows and a white solid is produced.

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2023

Q225 · Which row correctly describes the separate reactions of calcium and strontium with water? 9701/13 Oct/Nov 2023

19 Which row correctly describes the separate reactions of calcium and strontium with water? substance reduced substance oxidised more vigorous reaction A calcium or strontium water calcium + water B calcium or strontium water strontium + water C water calcium or strontium calcium + water D water calcium or strontium strontium + water

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2023

Q226 · L and M are both compounds of Group 2 elements 9701/13 Oct/Nov 2023

20 L and M are both compounds of Group 2 elements. L and M are both soluble in water. When solutions of L and M are mixed, a white precipitate is formed. What could be L and M? A barium chloride and magnesium sulfate B barium sulfate and magnesium chloride C barium nitrate and magnesium chloride D barium carbonate and magnesium nitrate

1 marks

Answer: A

This question in 9701/13 Oct/Nov 2023

Q227 · 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

Q228 · Separate samples of magnesium and calcium are added to an excess of dilute sulfuric acid 9701/12 Feb/March 2024

19 Separate samples of magnesium and calcium are added to an excess of dilute sulfuric acid. The observations are summarised in the table. metal observations magnesium vigorous reaction, bubbles of gas produced, magnesium completely dissolves calcium vigorous reaction initially, bubbles of gas produced, reaction soon stops and leaves most of the calcium unreacted Which statement explains the difference in these observations? A Calcium is a better oxidising agent than magnesium. B Calcium is a better reducing agent than magnesium. C Magnesium is a more reactive metal with all dilute acids than calcium. D Magnesium sulfate is more soluble than calcium sulfate.

1 marks

Answer: D

This question in 9701/12 Feb/March 2024

Q229 · Dolomite is a double carbonate, CaMg(CO3)2, and can be used instead of calcium carbonate… 9701/12 Feb/March 2024

20 Dolomite is a double carbonate, CaMg(CO3)2, and can be used instead of calcium carbonate for treating acidic soils. The three statements all refer to the agricultural use of these carbonates. 1 Dolomite and calcium carbonate are both less soluble than Ca(OH)2. 2 One mole of dolomite has the same neutralising effect as one mole of calcium carbonate. 3 Dolomite and calcium carbonate both increase the pH of acidic soils. Which statements are correct? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

1 marks

Answer: B

This question in 9701/12 Feb/March 2024

Q230 · The diagram shows the process of adding calcium nitrate and strontium nitrate to separate… 9701/12 Feb/March 2024

22 The diagram shows the process of adding calcium nitrate and strontium nitrate to separate boiling tubes and heating them. Identical conditions are used. Ca(NO3)2 water containing Sr(NO3)2 water containing universal indicator universal indicator heat heat As the reactions proceed, the water containing universal indicator changes colour. Which row describes the colour change and identifies the nitrate that causes the quickest colour change? colour change of nitrate that causes the universal indicator quickest colour change A green to blue Ca(NO3)2 B green to blue Sr(NO3)2 C green to red Ca(NO3)2 D green to red Sr(NO3)2

1 marks

Answer: C

This question in 9701/12 Feb/March 2024

Q231 · All solubility data in this question is given at the same temperature 9701/11 May/June 2024

19 All solubility data in this question is given at the same temperature. The table gives some data for compounds of calcium and for compounds of X, an unidentified element in Group 2. decomposition solubility of sulfate solubility of hydroxide element temperature of / mol per 100 g of water / mol per 100 g of water carbonate / C Ca 840 4.66  10–3 1.53  10–3 X 1150 What is the missing data for element X? solubility of sulfate solubility of hydroxide / mol per 100 g of water / mol per 100 g of water A 7.11  10–5 2.00  10–5 B 7.11  10–5 3.37  10–3 C 1.83  10–1 2.00  10–5 D 1.83  10–1 3.37  10–3

1 marks

Answer: B

This question in 9701/11 May/June 2024

Q232 · 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

Q233 · Compound Q dissolves in water 9701/11 May/June 2024

22 Compound Q dissolves in water. Q(aq) does not react with dilute sulfuric acid. Q(aq) forms a precipitate when aqueous silver nitrate is added. This precipitate is partially soluble in aqueous ammonia. What could be compound Q? A barium bromide B barium iodide C magnesium bromide D magnesium iodide

1 marks

Answer: C

This question in 9701/11 May/June 2024

Q234 · A mixture of calcium carbonate, calcium nitrate, strontium carbonate and strontium… 9701/12 May/June 2024

17 A mixture of calcium carbonate, calcium nitrate, strontium carbonate and strontium nitrate is thermally decomposed. The decomposition reaction of each substance goes to completion. Each substance is anhydrous. How many different products are formed? A 4 B 5 C 7 D 8

1 marks

Answer: B

This question in 9701/12 May/June 2024

Q235 · W is a solid that reacts with water to produce an alkaline solution 9701/12 May/June 2024

18 W is a solid that reacts with water to produce an alkaline solution. The addition of two drops of dilute H2SO4 to this alkaline solution produces a white precipitate. What could be the identity of solid W? A magnesium hydroxide B magnesium oxide C barium oxide D phosphorus oxide

1 marks

Answer: C

This question in 9701/12 May/June 2024

Q236 · 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

Q237 · 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

Q238 · Steam is passed over heated magnesium to give compound J and hydrogen 9701/13 May/June 2024

20 Steam is passed over heated magnesium to give compound J and hydrogen. What is not a property of compound J? A It has an Mr of 40.3. B It is basic. C It is a white solid. D It is very soluble in water.

1 marks

Answer: D

This question in 9701/13 May/June 2024

Q239 · V and W are two compounds 9701/11 Oct/Nov 2024

19 V and W are two compounds. Each one contains a different Group 2 element. A sample of each solid is added to water, shaken, and the pH of the resulting solution is measured. compound V W pH 13.6 9.4 Which row could identify V and W? V W A BaSO4 MgSO4 B MgSO4 BaSO4 C Ba(OH)2 Mg(OH)2 D Mg(OH)2 Ba(OH)2

1 marks

Answer: C

This question in 9701/11 Oct/Nov 2024

Q240 · Compound L decomposes on heating 9701/11 Oct/Nov 2024

20 Compound L decomposes on heating. One of the products is gas M. M reacts with unburned hydrocarbons to form peroxyacetyl nitrate, PAN. What could be the formula of L? A CaNO3 B Ca(NO3)2 C MgCO3 D Mg(CO3)2

1 marks

Answer: B

This question in 9701/11 Oct/Nov 2024

Q241 · X is a Group 2 element in either Period 3 or Period 5 9701/12 Oct/Nov 2024

20 X is a Group 2 element in either Period 3 or Period 5. X(OH)2 is less soluble in water than Ca(OH)2. When X(NO3)2 is heated, it decomposes. Which row is correct? equation describing identity of X decomposition of X(NO3)2 A Mg X(NO3)2  X + 2NO2 + O2 B Mg 2X(NO3)2  2XO + 4NO2 + O2 C Sr X(NO3)2  X + 2NO2 + O2 D Sr 2X(NO3)2  2XO + 4NO2 + O2

1 marks

Answer: B

This question in 9701/12 Oct/Nov 2024

Q242 · Which statement comparing magnesium and barium, or their compounds, is correct? 9701/12 Oct/Nov 2024

21 Which statement comparing magnesium and barium, or their compounds, is correct? A Magnesium reacts with dilute hydrochloric acid more rapidly than barium does. B One mole of magnesium carbonate gives off a greater amount of gas when it reacts with an excess of dilute hydrochloric acid than one mole of barium carbonate does. C The solubility of magnesium sulfate in water is greater than the solubility of barium sulfate in water. D Magnesium carbonate undergoes thermal decomposition less readily than barium carbonate does.

1 marks

Answer: C

This question in 9701/12 Oct/Nov 2024

Q243 · V and W are two compounds 9701/13 Oct/Nov 2024

19 V and W are two compounds. Each one contains a different Group 2 element. A sample of each solid is added to water, shaken, and the pH of the resulting solution is measured. compound V W pH 13.6 9.4 Which row could identify V and W? V W A BaSO4 MgSO4 B MgSO4 BaSO4 C Ba(OH)2 Mg(OH)2 D Mg(OH)2 Ba(OH)2

1 marks

Answer: C

This question in 9701/13 Oct/Nov 2024

Q244 · Compound L decomposes on heating 9701/13 Oct/Nov 2024

20 Compound L decomposes on heating. One of the products is gas M. M reacts with unburned hydrocarbons to form peroxyacetyl nitrate, PAN. What could be the formula of L? A CaNO3 B Ca(NO3)2 C MgCO3 D Mg(CO3)2

1 marks

Answer: B

This question in 9701/13 Oct/Nov 2024

Q245 · A reaction scheme for a Group 2 metal, M, is shown 9701/12 Feb/March 2025

18 A reaction scheme for a Group 2 metal, M, is shown. reacts with reacts with reacts with oxygen water sulfuric acid M X Y Z Which row is correct as M descends Group 2 from Mg to Ba? solubility of Y solubility of Z in water in water A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: C

This question in 9701/12 Feb/March 2025

Q246 · River water in an agricultural area contains NH4 +, CO3 2–, HCO3 –, Cl  and NO3 – ions 9701/12 Feb/March 2025

21 River water in an agricultural area contains NH4 +, CO3 2–, HCO3 –, Cl  and NO3 – ions. This water is treated by adding a calculated quantity of calcium hydroxide. What is precipitated from the river water when calcium hydroxide is added? A CaCl 2 B CaCO3 C Ca(NO3)2 D NH4OH

1 marks

Answer: B

This question in 9701/12 Feb/March 2025

Q247 · Radium is an element below barium in Group 2 of the Periodic Table 9701/11 May/June 2025

21 Radium is an element below barium in Group 2 of the Periodic Table. Which equation shows what happens when solid radium nitrate, Ra(NO3)2, is heated strongly? A 2Ra(NO3)2(s)  2RaO(s) + 4NO2(g) + O2(g) B 2Ra(NO3)2(s)  2RaO(s) + 2N2(g) + 5O2(g) C Ra(NO3)2(s)  RaO(s) + N2O(g) + 2O2(g) D 4Ra(NO3)2(s)  2Ra2O(s) + 8NO2(g) + 3O2(g)

1 marks

Answer: A

This question in 9701/11 May/June 2025

Q248 · Which statement is correct? 9701/13 May/June 2025

18 Which statement is correct? A Barium oxide reacts with water at room temperature to form barium hydroxide and hydrogen. B Calcium oxide does not react with water at room temperature. C Magnesium hydroxide reacts with steam to form magnesium oxide and hydrogen. D Strontium oxide reacts with water at room temperature to form strontium hydroxide only.

1 marks

Answer: D

This question in 9701/13 May/June 2025

Q249 · W, X, Y and Z are Group 2 elements barium, calcium, magnesium and strontium but not in… 9701/13 May/June 2025

24 W, X, Y and Z are Group 2 elements barium, calcium, magnesium and strontium but not in that order. W reacts faster with dilute hydrochloric acid than Y. The hydroxide of X is less soluble in water than the hydroxide of W. The sulfate of Y is the most soluble of the sulfates of W, X, Y and Z. The carbonate of Z decomposes more slowly than the carbonate of W at the same temperature. What is the Mr of the nitrate of W? A 148.3 B 164.1 C 211.6 D 261.3

1 marks

Answer: C

This question in 9701/13 May/June 2025

Q250 · Substance J reacts with water 9701/14 May/June 2025

19 Substance J reacts with water. A gas is given off and the pH of the solution increases. The solution is then reacted with sulfuric acid and a white precipitate forms. What could be substance J? A barium B barium oxide C magnesium D magnesium oxide

1 marks

Answer: A

This question in 9701/14 May/June 2025

Q251 · The flow diagram shows two successive reactions starting from element Q 9701/14 May/June 2025

22 The flow diagram shows two successive reactions starting from element Q. Element Q is either calcium or barium. 1 heat with oxygen element Q compound R 2 add to water Element Q forms a nitrate that is less thermally stable than strontium nitrate. What is the identity of compound R? A CaO B Ca(OH)2 C BaO D Ba(OH)2

1 marks

Answer: B

This question in 9701/14 May/June 2025

Q252 · The trends seen in Group 2 can be used to predict the properties of radium and its… 9701/11 Oct/Nov 2025

19 The trends seen in Group 2 can be used to predict the properties of radium and its compounds. Which statement is correct? A Radium has the highest second ionisation energy of the elements in Group 2. B Radium hydroxide is the least soluble of the hydroxides of the elements in Group 2. C Radium carbonate has the lowest thermal stability of the carbonates of the elements in Group 2. D Radium reacts faster with water than the other elements in Group 2.

1 marks

Answer: D

This question in 9701/11 Oct/Nov 2025

Q253 · Equal masses of CaCO3, Ca(NO3)2, BaCO3 and Ba(NO3)2 are thermally decomposed 9701/11 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 9701/11 Oct/Nov 2025

Q254 · The trends seen in Group 2 can be used to predict the properties of radium and its… 9701/13 Oct/Nov 2025

19 The trends seen in Group 2 can be used to predict the properties of radium and its compounds. Which statement is correct? A Radium has the highest second ionisation energy of the elements in Group 2. B Radium hydroxide is the least soluble of the hydroxides of the elements in Group 2. C Radium carbonate has the lowest thermal stability of the carbonates of the elements in Group 2. D Radium reacts faster with water than the other elements in Group 2.

1 marks

Answer: D

This question in 9701/13 Oct/Nov 2025

Q255 · 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