Cambridge IGCSE Chemistry (9-1) 0971 — 2023 May/June Paper 2 · Variant 2
0971/22/M/J/23 · 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 · Four physical changes of ethanol are listed
1 Four physical changes of ethanol are listed. 1 condensation 2 evaporation 3 freezing 4 boiling In which changes do the particles move further apart? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4
Mark scheme: C
Q2 · An atom of element X contains: ● 5 protons ● 6 neutrons ● 5 electrons
2 An atom of element X contains: ● 5 protons ● 6 neutrons ● 5 electrons. Which statements about element X are correct? 1 X has an atomic number of 6. 2 X has a nucleon number of 11. 3 X is in Group II of the Periodic Table. 4 X is in the second period of the Periodic Table. A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4
Mark scheme: D
Q3 · Ammonia, NH3, is a covalent molecule
3 Ammonia, NH3, is a covalent molecule. Which diagram shows the outer-shell electron arrangement in a molecule of ammonia? A B H N H H N H H H C D H N H H N H H H
Mark scheme: C
Q4 · Which structure does silicon(IV) oxide most closely resemble?
4 Which structure does silicon(IV) oxide most closely resemble? A carbon dioxide B diamond C graphite D sodium chloride
Mark scheme: B
Q5 · Substance P conducts electricity when solid
5 Substance P conducts electricity when solid. Which particles move in solid P so that it can conduct electricity? 1 anions 2 cations 3 electrons A 1 and 2 B 1 only C 2 and 3 D 3 only
Mark scheme: D
Q6 · Which equation represents a chemical change?
6 Which equation represents a chemical change? A BaCl 2(s) → BaCl 2(l) B Ca2+(aq) + SO4 2–(aq) → CaSO4(s) C KCl (s) + H2O(l) → K+(aq) + Cl –(aq) D Na+(aq) + NO3 –(aq) → NaNO3(aq)
Mark scheme: B
Q7 · Which sample contains the largest number of molecules?
7 Which sample contains the largest number of molecules? A 16 g of methane, CH4(g) B 16 g of oxygen, O2(g) C 16 g of phosphorus, P4(s) D 16 dm3 of methane at r.t.p., CH4(g)
Mark scheme: A
Q8 · The concentration of a sample of dilute aqueous sodium hydroxide is found by titration
8 The concentration of a sample of dilute aqueous sodium hydroxide is found by titration. The apparatus used is shown. dilute aqueous hydrochloric acid, HCl(aq) dilute aqueous sodium hydroxide, NaOH(aq) Which information is needed to calculate the concentration of the dilute aqueous sodium hydroxide in mol/dm?? concentration volume of molar mass volume of molar mass of HCl HCl used of HCl NaOH used of NaOH Jv Jv Jv Jv Jv v v x v x x v v v x v x x x v key Jv = needed X =not needed
Mark scheme: B
Q9 · In experiment 1, aqueous copper(II) sulfate is electrolysed using graphite electrodes
9 In experiment 1, aqueous copper(II) sulfate is electrolysed using graphite electrodes. In experiment 2, aqueous copper(II) sulfate is electrolysed using copper electrodes. Which statement identifies a half-equation for a reaction at one of the electrodes? A In experiment 1, the half-equation for the anode reaction is 4OH– → 2H2O + O2 + 4e–. B In experiment 1, the half-equation for the cathode reaction is 2H+ + 2e– → H2. C In experiment 2, the half-equation for the anode reaction is Cu2+ + 2e– → Cu. D In experiment 2, the half-equation for the cathode reaction is 4OH– → 2H2O + O2 + 4e–.
Mark scheme: A
Q10 · Which substance is not produced during the electrolysis of concentrated aqueous sodium…
10 Which substance is not produced during the electrolysis of concentrated aqueous sodium chloride? A chlorine B hydrogen C sodium D sodium hydroxide
Mark scheme: C
Q11 · Methane burns in excess oxygen
11 Methane burns in excess oxygen. The equation is shown. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) Bond energies are shown. bond energy bond in kJ / mol C=O 805 C–H 410 O=O 496 O–H 460 What is the energy change for the reaction? A (4 × 410 + 2 × 496) – (2 × 805 + 4 × 460) B (2 × 805 + 4 × 460) – (4 × 410 + 2 × 496) C (410 + 2 × 496) – (805 + 2 × 460) D (410 + 496) – (805 + 460)
Mark scheme: A
Q12 · Which change increases the rate of reaction by decreasing the activation energy, Ea?
12 Which change increases the rate of reaction by decreasing the activation energy, Ea? A addition of a catalyst B decrease in size of solid reactants C increase in concentration of solutions D increase in temperature
Mark scheme: A
Q13 · In the Contact process, sulfur dioxide is reacted with oxygen to form sulfur trioxide
13 In the Contact process, sulfur dioxide is reacted with oxygen to form sulfur trioxide. Which conditions are used in this reaction? temperature pressure catalyst / °C / kPa A 300 200 iron B 300 20 000 vanadium(V) oxide C 450 200 vanadium(V) oxide D 450 20 000 iron
Mark scheme: C
Q14 · Which reaction is reversible?
14 Which reaction is reversible? A an iron nail rusting when left in moist air B limestone reacting with an acid to form carbon dioxide gas C magnesium burning in air to produce a white ash D white anhydrous copper(II) sulfate turning blue when water is added
Mark scheme: D
Q15 · The equation for the reaction of sulfur dioxide with acidified potassium dichromate(VI)…
15 The equation for the reaction of sulfur dioxide with acidified potassium dichromate(VI) is shown. 3SO2 + Cr2O7 2– + 2H+ → 3SO4 2– + 2Cr3+ + H2O What is oxidised and what is the oxidising agent? oxidised oxidising agent A SO2 Cr2O7 2– B SO2 H+ C Cr2O7 2– H+ D Cr2O7 2– Cr2O7 2–
Mark scheme: A
Q16 · What is the definition of a strong acid?
16 What is the definition of a strong acid? A a proton acceptor that is completely dissociated in aqueous solution B a proton acceptor that is partially dissociated in aqueous solution C a proton donor that is completely dissociated in aqueous solution D a proton donor that is partially dissociated in aqueous solution
Mark scheme: C
More questions on The characteristic properties of acids and bases
Q17 · Which statement about amphoteric oxides is correct?
17 Which statement about amphoteric oxides is correct? A They are made by combining an acidic oxide with a basic oxide. B They react with water to give a solution of pH 7. C They react with both acids and bases. D They do not react with acids or bases.
Mark scheme: C
Q18 · Copper(II) carbonate is formed when aqueous sodium carbonate is added to aqueous…
18 Copper(II) carbonate is formed when aqueous sodium carbonate is added to aqueous copper(II) nitrate. The ionic equation for the reaction is shown. CO3 2–(aq) + Cu2+(aq) → CuCO3(s) How is pure copper(II) carbonate obtained from the reaction mixture? A evaporate → filter → dry B evaporate → wash → crystallise C filter → evaporate → crystallise D filter → wash → dry
Mark scheme: D
Q19 · Q and R are elements in the same period of the Periodic Table
19 Q and R are elements in the same period of the Periodic Table. Q has 7 electrons in its outer shell and R has 2 electrons in its outer shell. Which statement about Q and R is correct? A Q is a metal and R is a non-metal. B Q and R have different numbers of electron shells. C R is found to the right of Q in the Periodic Table. D The proton number of R is less than the proton number of Q.
Mark scheme: D
Q20 · Lead(II) sulfate is an insoluble salt
20 Lead(II) sulfate is an insoluble salt. Which reaction produces a mixture from which lead(II) sulfate is obtained by filtration? A adding solid lead(II) carbonate to dilute sulfuric acid B adding solid lead(II) hydroxide to dilute sulfuric acid C adding metallic lead to dilute sulfuric acid D adding aqueous lead(II) nitrate to dilute sulfuric acid
Mark scheme: D
Q21 · Which statement about alkali metals is correct?
21 Which statement about alkali metals is correct? A Lithium is more dense than sodium. B Sodium is more reactive than potassium. C Sodium has a higher melting point than potassium. D They are in Group II of the Periodic Table.
Mark scheme: C
Q22 · Which row describes the properties of a transition element?
22 Which row describes the properties of a transition element? melting forms coloured density point compounds A high low no B high high yes C low low no D low low yes
Mark scheme: B
Q23 · Which row identifies the properties of zinc?
23 Which row identifies the properties of zinc? thermal reacts with conductivity dilute acid A good yes B good no C poor yes D poor no
Mark scheme: A
Q24 · Uses of metals depend on their properties
24 Uses of metals depend on their properties. Which property is necessary for the use given? use of the metal property of the metal A car bodies ductile B cutlery conducts heat C food containers resists corrosion D overhead electrical cables high density
Mark scheme: C
Q25 · Which compounds both contribute to acid rain?
25 Which compounds both contribute to acid rain? A carbon monoxide and carbon dioxide B carbon monoxide and oxides of nitrogen C oxides of nitrogen and sulfur dioxide D sulfur dioxide and carbon dioxide
Mark scheme: C
Q26 · P, Q, R and S are metals
26 P, Q, R and S are metals. P reacts with dilute hydrochloric acid, forming hydrogen. Q reacts violently with water. R reacts with water to give hydrogen. S is formed by heating its oxide with carbon. Which row identifies the metals? P Q R S A copper sodium potassium iron B zinc magnesium calcium iron C zinc sodium calcium magnesium D iron potassium sodium zinc
Mark scheme: D
Q27 · Which compound is formed when iron rusts?
27 Which compound is formed when iron rusts? A anhydrous iron(II) oxide B anhydrous iron(III) oxide C hydrated iron(III) hydroxide D hydrated iron(III) oxide
Mark scheme: D
Q28 · Why is cryolite used in the extraction of aluminium by electrolysis?
28 Why is cryolite used in the extraction of aluminium by electrolysis? A It dissolves the aluminium oxide. B It protects the anodes from corrosion. C It changes bauxite to aluminium oxide. D It decreases the melting point of the aluminium.
Mark scheme: A
Q29 · A wax candle is made from a mixture of hydrocarbons
29 A wax candle is made from a mixture of hydrocarbons. The candle is lit and placed in a gas jar along with a strip of cobalt(II) chloride test paper as shown. cobalt(II) chloride paper gas jar combustion products wax candle After a short time, the oxygen in the jar is used up and the candle flame goes out. Which substance does the cobalt(II) chloride paper identify? A carbon dioxide B carbon monoxide C sulfur dioxide D water
Mark scheme: D
Q30 · The hydrocarbon C4H8 has two structural isomers, but-1-ene and but-2-ene
30 The hydrocarbon C4H8 has two structural isomers, but-1-ene and but-2-ene. Which statement is correct? A But-2-ene has the structural formula CH3CH=CHCH3 and the same general formula as butane. B But-2-ene has the structural formula CH3CH=CHCH3 and the same empirical formula as ethene. C But-1-ene has the structural formula CH3CH2CH=CH2 and the same general formula as butane. D But-1-ene has the structural formula CH3CHCH2=CH and the same empirical formula as ethene.
Mark scheme: B
More questions on Formulae, functional groups and terminology
Q31 · Which compound rapidly decolourises aqueous bromine?
31 Which compound rapidly decolourises aqueous bromine? A propane B propanoic acid C propanol D propene
Mark scheme: D
Q32 · What are the products of the addition reactions of ethene with bromine and hydrogen?
32 What are the products of the addition reactions of ethene with bromine and hydrogen? bromine hydrogen A CH2BrCH2Br CH3CH3 B CH2BrCH2Br CH2CH2 C CH3CH2Br CH3CH3 D CH3CH2Br CH2CH2
Mark scheme: A
Q33 · Ethanol is manufactured by fermentation and the catalytic addition of steam to ethene
33 Ethanol is manufactured by fermentation and the catalytic addition of steam to ethene. Which row describes an advantage of both methods? from sugar by fermentation from ethene and steam A ethanol needs to be purified the process is continuous B it is a batch process ethene comes from petroleum C the process is slow the process is rapid D renewable resources are used the ethanol produced is pure
Mark scheme: D
Q34 · Methanoic acid and propan-1-ol react to form an ester
34 Methanoic acid and propan-1-ol react to form an ester. What is the structural formula of the ester? A HCOOCH2CH2CH3 B CH3CH2COOCH3 C CH3COOCH2CH3 D CH3CH2CH2COOH
Mark scheme: A
Q35 · What is the correct structure of PET?
35 What is the correct structure of PET? O O H O O A C C N N C C N N H H H O O O O B C C O O C C O O O O H O O H C C C N N C C N N H H O O O O D C C O C O C O
Mark scheme: B
Q36 · Alkanes undergo substitution reactions in the presence of UV light
36 Alkanes undergo substitution reactions in the presence of UV light. Which equation represents a substitution reaction of ethane? A C2H6 + Cl 2 → C2H4 + 2HCl B C2H6 + Cl 2 → C2H5Cl + HCl C C2H6 + Cl 2 → C2H4Cl 2 + H2 D C2H6 + HCl → C2H5Cl + H2
Mark scheme: B
Q37 · Methane reacts with chlorine in substitution reactions
37 Methane reacts with chlorine in substitution reactions. How many different products, containing a single carbon atom, can be made during the reactions? A 2 B 3 C 4 D 5
Mark scheme: C
Q38 · Rock salt is a mixture of salt and sand
38 Rock salt is a mixture of salt and sand. The method used to separate the sand from the salt is listed. step 1 Crush the rock salt, add to warm water and stir. step 2 Pour the mixture through a filter paper held in a funnel. step 3 Evaporate the water to crystallise the salt. Which statement about the method is correct? A The filtrate in step 2 is pure water. B The residue in step 2 is pure crystals of salt. C The solute is salt. D The solvent is a mixture of salt and water.
Mark scheme: C
Q39 · Two compounds, M and N, are dissolved in water and separated by chromatography
39 Two compounds, M and N, are dissolved in water and separated by chromatography. The results are shown. solvent front N 10 cm M 2 cm baseline What is the Rf value of M and which compound is most soluble in water? most soluble Rf value of M compound A 0.2 M B 0.2 N C 5.0 M D 5.0 N
Mark scheme: B
Q40 · When acid is added to salt X, a gas is produced which turns limewater milky
40 When acid is added to salt X, a gas is produced which turns limewater milky. When sodium hydroxide is added to salt X, a gas is produced which turns litmus paper blue. What is X? A CaCO3 B (NH4)2CO3 C NH4NO3 D ZnCO3
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.
2Alkenes2Electrolysis2Identification of ions and gases2Preparation of salts2Reversible reactions and equilibrium2Acid–base titrations1Air quality and climate1Alcohols1Arrangement of elements1Atomic structure and the Periodic Table1Carboxylic acids1Chromatography1Corrosion of metals1Exothermic and endothermic reactions1Extraction of metals1Formulae, functional groups and terminology1Giant covalent structures1Group I properties1Metallic bonding1Oxides1Physical and chemical changes1Polymers1Properties of metals1Rate of reaction1Reactivity series1Redox1Separation and purification1Simple molecules and covalent bonds1Solids, liquids and gases1The characteristic properties of acids and bases1The mole and the Avogadro constant1Transition elements1Uses of metals1What you needed in this session
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