Cambridge IGCSE Chemistry (9-1) 0971 — 2022 May/June Paper 2 · Variant 2
0971/22/M/J/22 · 40 questions · 40 marks · ≈45 min
The question paper and its mark scheme, free to read here and free to download. This is Cambridge’s own paper, exactly as it was sat.
Question paper16 pages
Mark scheme3 pages
Answers below. Sit the paper first if you are practising.
Questions as text
Q1 · Which two gases will diffuse at the same rate, at the same temperature?
1 Which two gases will diffuse at the same rate, at the same temperature? A carbon monoxide and carbon dioxide B carbon monoxide and nitrogen C chlorine and fluorine D nitrogen and oxygen
Mark scheme: B
Q2 · A student measures the time taken for 2.0 g of magnesium to dissolve in 50 cm3 of dilute…
2 A student measures the time taken for 2.0 g of magnesium to dissolve in 50 cm3 of dilute sulfuric acid. Which apparatus is essential to complete the experiment? 1 stop-clock 2 measuring cylinder 3 thermometer 4 balance A 1, 2 and 4 B 1 and 2 only C 1 and 4 only D 2, 3 and 4
Mark scheme: A
Q3 · A chromatogram of a single substance T is shown
3 A chromatogram of a single substance T is shown. solvent front 3 1 4 2 baseline Which measurements are used to find the Rf value of T? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4
Mark scheme: D
Q4 · X and Y are two different elements
4 X and Y are two different elements. X and Y have the same number of nucleons. Which statement about X and Y is correct? A They have the same physical properties. B Their atoms have the same number of electrons. C They are in different groups of the Periodic Table. D They have different relative masses.
Mark scheme: C
Q5 · The diagrams show the structures of three macromolecules P, Q and R
5 The diagrams show the structures of three macromolecules P, Q and R. P Q R What are P, Q and R? P Q R A diamond silicon(IV) oxide graphite B graphite diamond silicon(IV) oxide C silicon(IV) oxide diamond graphite D silicon(IV) oxide graphite diamond
Mark scheme: C
Q6 · Which dot-and-cross diagram shows the arrangement of outer shell electrons in a molecule…
6 Which dot-and-cross diagram shows the arrangement of outer shell electrons in a molecule of hydrogen chloride? A B C D H Cl H Cl H Cl H Cl
Mark scheme: A
Q7 · The equation for the reaction between barium chloride and dilute sulfuric acid is shown
7 The equation for the reaction between barium chloride and dilute sulfuric acid is shown. BaCl 2 + H2SO4 BaSO4 + 2HCl Which row shows the state symbols for this equation? BaCl 2 H2SO4 BaSO4 2HCl A (aq) (aq) (s) (aq) B (aq) (l) (s) (aq) C (l) (aq) (s) (l) D (aq) (l) (aq) (l)
Mark scheme: A
Q8 · Methane and steam react in the presence of a catalyst
8 Methane and steam react in the presence of a catalyst. CH4(g) + H2O(g) CO(g) + 3H2(g) 0.5 mol of methane reacts completely with 0.5 mol of steam. What is the volume of carbon monoxide and hydrogen produced, measured at room temperature and pressure? volume volume of CO / dm3 of H2 / dm3 A 0.5 1.5 B 1.0 3.0 C 12.0 12.0 D 12.0 36.0
Mark scheme: D
Q9 · A compound of element X has the formula X2O and a relative formula mass of 144
9 A compound of element X has the formula X2O and a relative formula mass of 144. What is element X? A copper, Cu B gadolinium, Gd C sulfur, S D tellurium, Te
Mark scheme: A
Q10 · The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated…
10 The diagram shows the electrolysis of concentrated hydrochloric acid and concentrated aqueous sodium chloride using carbon electrodes. + – + – electrode 1 electrode 2 electrode 3 electrode 4 concentrated concentrated aqueous hydrochloric acid sodium chloride At which electrodes is hydrogen produced? A electrode 1 only B electrodes 1 and 3 C electrode 2 only D electrodes 2 and 4
Mark scheme: D
Q11 · The diagram shows the electrolysis of aqueous copper(II) sulfate using inert electrodes
11 The diagram shows the electrolysis of aqueous copper(II) sulfate using inert electrodes. Which arrow shows the movement of electrons in the circuit? power supply A B anode cathode C D
Mark scheme: B
Q12 · Which row identifies a chemical change and a physical change?
12 Which row identifies a chemical change and a physical change? chemical change physical change A boiling ethanol burning ethanol B burning ethanol evaporating ethanol C dissolving ethanol in water burning ethanol D evaporating ethanol dissolving ethanol in water
Mark scheme: B
Q13 · Which statements explain why increasing the concentration of a reactant increases the…
13 Which statements explain why increasing the concentration of a reactant increases the rate of reaction? 1 It increases the collision rate of particles. 2 It lowers the activation energy. 3 A greater proportion of the colliding molecules have the required activation energy. 4 There are more particles per unit volume. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4
Mark scheme: B
Q14 · When the colourless gas N2O4 is heated, it forms the brown gas NO2
14 When the colourless gas N2O4 is heated, it forms the brown gas NO2. When the reaction mixture is cooled, the brown colour fades and turns back to colourless. Which type of reaction is described by these observations? A decomposition B displacement C reduction D reversible
Mark scheme: D
Q15 · Water is added to anhydrous copper(II) sulfate
15 Water is added to anhydrous copper(II) sulfate. What happens during the reaction? A The copper(II) sulfate turns blue and the solution formed gets colder. B The copper(II) sulfate turns blue and the solution formed gets hotter. C The copper(II) sulfate turns white and the solution formed gets colder. D The copper(II) sulfate turns white and the solution formed gets hotter.
Mark scheme: B
Q16 · Which arrow on the energy level diagram shows the overall energy change for an…
16 Which arrow on the energy level diagram shows the overall energy change for an endothermic reaction? C A products energy D B reactants progress of reaction
Mark scheme: B
Q17 · When a hydrogen–oxygen fuel cell is in operation, a different reaction happens at each…
17 When a hydrogen–oxygen fuel cell is in operation, a different reaction happens at each electrode. at the hydrogen electrode H2 2H+ + 2e– at the oxygen electrode O2 + 2H2O + 4e– 4OH– The electrons that are lost at the hydrogen electrode travel through the external circuit to the oxygen electrode, where they are gained by the oxygen and water. A hydrogen–oxygen fuel cell is operated for a period of time and four moles of oxygen molecules are consumed. Which mass of hydrogen is consumed? A 2.0 g B 4.0 g C 8.0 g D 16.0 g
Mark scheme: D
Q18 · The oxides of two elements, X and Y, are separately dissolved in water and the pH of each…
18 The oxides of two elements, X and Y, are separately dissolved in water and the pH of each solution tested. oxide tested pH of solution X 1 Y 13 Which information about X and Y is correct? oxide is oxide is metal non-metal acidic basic A X Y X Y B X Y Y X C Y X X Y D Y X Y X
Mark scheme: B
Q19 · An acid is neutralised by adding an excess of an insoluble solid base
19 An acid is neutralised by adding an excess of an insoluble solid base. A soluble salt is formed. How is the pure salt obtained from the reaction mixture? A crystallisation evaporation filtration B evaporation crystallisation filtration C filtration crystallisation evaporation D filtration evaporation crystallisation
Mark scheme: D
Q20 · Substance J takes part in a redox reaction
20 Substance J takes part in a redox reaction. In the reaction, J gains electrons. Which statement is correct? A J is the oxidising agent and it is oxidised in the reaction. B J is the oxidising agent and it is reduced in the reaction. C J is the reducing agent and it is oxidised in the reaction. D J is the reducing agent and it is reduced in the reaction.
Mark scheme: B
Q21 · Elements in Group IV of the Periodic Table are shown
21 Elements in Group IV of the Periodic Table are shown. carbon silicon germanium tin lead What does not occur in Group IV as it is descended? A The proton number of the elements increases. B The elements become more metallic. C The elements have more electrons in their outer shell. D The elements have more electron shells.
Mark scheme: C
Q22 · Which statement about acids is correct?
22 Which statement about acids is correct? A Acids are proton acceptors. B Acids transfer electrons to bases in aqueous solution. C Hydrochloric acid reacts with ammonium hydroxide to produce ammonia. D Ethanoic acid partially ionises in aqueous solution.
Mark scheme: D
More questions on The characteristic properties of acids and bases
Q23 · Which elements have both a high melting point and variable oxidation states?
23 Which elements have both a high melting point and variable oxidation states? A alkali metals B transition elements C halogens D noble gases
Mark scheme: B
Q24 · Lithium, sodium and potassium are elements in Group I of the Periodic Table
24 Lithium, sodium and potassium are elements in Group I of the Periodic Table. Chlorine, bromine and iodine are elements in Group VII of the Periodic Table. Which row identifies the least dense of these elements in each group? Group I Group VII A lithium chlorine B lithium iodine C potassium chlorine D potassium iodine
Mark scheme: A
Q25 · The reactions of metals P, Q, R and S are shown
25 The reactions of metals P, Q, R and S are shown. reaction reaction with reduction of the metal with water hydrochloric acid metal oxide with carbon P no reaction no reaction reduced Q slow vigorous no reaction R vigorous vigorous no reaction S very slow vigorous reduced What is the order of reactivity of the metals? least most reactive reactive A P S Q R B P Q S R C R S Q P D R Q S P
Mark scheme: A
Q26 · The number of protons and the number of neutrons in the atoms of elements X, Y and Z are…
26 The number of protons and the number of neutrons in the atoms of elements X, Y and Z are shown. number of number of protons neutrons X 6 6 Y 7 6 Z 8 10 Which statement about the elements is correct? A X and Y are isotopes of the same element. B Z forms an ion with a +2 charge. C X and Z react together to form an ionic compound. D X, Y and Z are non-metals.
Mark scheme: D
Q27 · Which diagram represents the arrangement of atoms in an alloy?
27 Which diagram represents the arrangement of atoms in an alloy? A B C D
Mark scheme: D
Q28 · Three metal compounds, J, K and L, are heated using a Bunsen burner
28 Three metal compounds, J, K and L, are heated using a Bunsen burner. The results are shown. J colourless gas produced, which relights a glowing splint K colourless gas produced, which turns limewater milky L no reaction Which row identifies J, K and L? J K L A magnesium carbonate potassium carbonate potassium nitrate B magnesium carbonate potassium nitrate potassium carbonate C potassium nitrate magnesium carbonate potassium carbonate D potassium nitrate potassium carbonate magnesium carbonate
Mark scheme: C
Q29 · Processes involved in the extraction of zinc are listed
29 Processes involved in the extraction of zinc are listed. 1 Heat zinc oxide with carbon. 2 Condense zinc vapour. 3 Vaporise the zinc. 4 Roast zinc ore in air. In which order are the processes carried out? A 1 2 3 4 B 4 3 1 2 C 4 1 3 2 D 1 4 3 2
Mark scheme: C
Q30 · Which process uses sacrificial protection to prevent steel from rusting?
30 Which process uses sacrificial protection to prevent steel from rusting? A galvanising B oiling C copper plating D painting
Mark scheme: A
Q31 · Fertilisers are used to provide three of the elements needed for plant growth
31 Fertilisers are used to provide three of the elements needed for plant growth. Which two compounds would give a fertiliser containing all three of these elements? A Ca(NO3)2 and (NH4)2SO4 B Ca(NO3)2 and (NH4)3PO4 C KNO3 and (NH4)2SO4 D KNO3 and (NH4)3PO4
Mark scheme: D
Q32 · Which processes produce carbon dioxide?
32 Which processes produce carbon dioxide? 1 respiration 2 photosynthesis 3 fermentation 4 combustion of hydrogen A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4
Mark scheme: A
Q33 · Which reaction in the Contact process requires the use of a catalyst?
33 Which reaction in the Contact process requires the use of a catalyst? A S + O2 SO2 B 2SO2 + O2 2SO3 C SO3 + H2SO4 H2S2O7 D H2S2O7 + H2O 2H2SO4
Mark scheme: B
Q34 · What are the products when limestone (calcium carbonate) is heated strongly?
34 What are the products when limestone (calcium carbonate) is heated strongly? A calcium hydroxide and carbon dioxide B calcium hydroxide and carbon monoxide C calcium oxide and carbon dioxide D calcium oxide and carbon monoxide
Mark scheme: C
Q35 · The structure of ester W is shown
35 The structure of ester W is shown. H O H C C H H O C H H Which row gives the names of ester W and the carboxylic acid and alcohol from which it is made? name of ester W carboxylic acid alcohol A ethyl methanoate ethanoic acid methanol B ethyl methanoate methanoic acid ethanol C methyl ethanoate ethanoic acid methanol D methyl ethanoate methanoic acid ethanol
Mark scheme: C
Q36 · Ethene reacts with substance X to form ethanol
36 Ethene reacts with substance X to form ethanol. What is X? A ethanoic acid B glucose C hydrogen D steam
Mark scheme: D
Q37 · Alkenes can be produced by cracking large hydrocarbon molecules to form smaller…
37 Alkenes can be produced by cracking large hydrocarbon molecules to form smaller hydrocarbon molecules. Which equations represent possible reactions when tetradecane, C14H30, is cracked? 1 C14H30 C2H6 + C3H6 + C4H8 + C5H10 2 C14H30 H2 + C2H4 + C3H6 + C4H8 + C5H10 3 C14H30 C2H6 + 4C3H6 4 C14H30 C2H6 + C3H8 + C9H18 A 1 only B 1 and 4 C 1, 2 and 3 D 3 and 4
Mark scheme: C
Q38 · The structures of some hydrocarbons are shown
38 The structures of some hydrocarbons are shown. 1 2 3 4 H H H H H H H H H H H C C H H C H H C C C H H C C C C H H H H H H H H H H H H H C C H H C C C H H H H H H Which statement about the hydrocarbons is correct? A 1 and 2 have a different general formula. B 1 and 4 are in different homologous series. C 2 and 3 are structural isomers. D 3 and 4 have the same empirical formula.
Mark scheme: D
Q39 · Ethane reacts with chlorine in the presence of ultraviolet light
39 Ethane reacts with chlorine in the presence of ultraviolet light. Which substances are produced in the reaction? 1 2 3 4 H H H H H H H C C Cl H C C H H Cl H H Cl Cl A 1, 2 and 3 B 1 and 3 only C 2, 3 and 4 D 2 and 4 only
Mark scheme: C
Q40 · Which polymer structure has the same linkages as Terylene?
40 Which polymer structure has the same linkages as Terylene? A B CH3 CH3 CH3 CH3 O C C O C C C C H n H H n O OH C D H CH3 CH3 O CH3 CH3 N C C C C C O H H n H H n
Mark scheme: B
What was in this paper
The subtopics covered by these 40 questions, and how many questions each got. Open one in a new tab to see every Cambridge question on it.
2Electrolysis2Exothermic and endothermic reactions2Isotopes2Oxides2Reversible reactions and equilibrium2Air quality and climate1Alcohols1Alloys and their properties1Arrangement of elements1Carboxylic acids1Chromatography1Corrosion of metals1Diffusion1Experimental design1Extraction of metals1Fertilisers1Formulae1Fuels1Giant covalent structures1Group I properties1Hydrogen–oxygen fuel cells1Identification of ions and gases1Physical and chemical changes1Polymers1Preparation of salts1Rate of reaction1Reactivity series1Redox1Relative masses of atoms and molecules1Simple molecules and covalent bonds1The characteristic properties of acids and bases1The mole and the Avogadro constant1Transition elements1What you needed in this session
Cambridge’s own grade thresholds for 2022 May/June, Paper 2 · Variant 2. A higher threshold means an easier paper — the bar moves with how the cohort did.