Cambridge A Level Chemistry 9701 — 2016 May/June Paper 1 · Variant 1

Question 1

1 Which equation shows the reaction that occurs during the standard enthalpy change of atomisation of bromine? A Br2(l)  →  2Br(g) B Br2(g)  →  2Br(g) C 1 Br2(l)  →  Br(g) 2 D 1 Br2(g)  →  Br(g) 2

Accepted Answer

C

Question 2

2 What is the correct number of bonds of each type in the Al 2Cl 6 molecule? co-ordinate covalent (dative covalent) A 6 1 B 6 2 C 7 0 D 7 1

Accepted Answer

B

Question 3

3 Tetraethyl lead, Pb(C2H5)4, has been used as a petrol additive. What is the percentage by mass of carbon in tetraethyl lead? A 10.2 B 14.9 C 29.7 D 32.0

Accepted Answer

C

Question 4

4 When nuclear reactions take place, the elements produced are different from the elements that reacted. Nuclear equations, such as the one below, are used to represent the changes that occur. 235 U +  n 1 0   → 144 Ba + 89 Kr +  3 n 0 1 92 56 36 The nucleon (mass) number total is constant at 236 and the proton number total is constant at 92. In another nuclear reaction, uranium-238 is reacted with deuterium atoms, 2 H. An isotope of a 1 new element, J, is formed as well as two neutrons. 238 U +  H 2 →  J  +  2 n 0 1 92 1 What is isotope J? A 238Np B 238Pu C 240Np D 240Pu

Accepted Answer

A

Question 5

5 Dicarbon monoxide, C2O, is found in dust clouds in space. The structure of this molecule is C=C=O. The molecule contains no unpaired electrons. How many lone pairs of electrons are present in a molecule of C2O? A 1 B 2 C 3 D 4

Accepted Answer

C

Question 6

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

Accepted Answer

D

Question 7

7 At room temperature and pressure, H2O is a liquid and H2S is a gas. What is the reason for this difference? A O has higher first and second ionisation energies than S. B The covalent bond between O and H is stronger than the covalent bond between S and H. C There is significant hydrogen bonding between H2O molecules but not between H2S molecules. D The instantaneous dipole-induced dipole forces between H2O molecules are stronger than the instantaneous dipole-induced dipole forces between H2S molecules.

Accepted Answer

C

Question 8

8 Gaseous phosphorus pentachloride can be decomposed into gaseous phosphorus trichloride and chlorine by heating. The table gives the bond energies. bond bond energy / kJ mol–1 P–Cl (in both chlorides) 330 Cl –Cl 242 What is the enthalpy change for the decomposition of PCl 5 to PCl 3 and Cl 2? A –418 kJ mol–1 B –88 kJ mol–1 C +88 kJ mol–1 D +418 kJ mol–1

Accepted Answer

D

Question 9

9 An aqueous solution was prepared containing a mixture of 1.0 mol of AgNO3 and 1.0 mol of FeSO4 in 1.00 dm3 of water. When equilibrium was established, there was 0.44 mol of Ag+(aq) in the mixture. Ag+(aq)  +  Fe2+(aq) Ag(s)  +  Fe3+(aq) What is the numerical value of Kc? A 0.62 B 1.40 C 1.62 D 2.89

Accepted Answer

D

Question 10

10 The equation for the reaction between carbon monoxide and hydrogen is shown. CO(g)  +  3H2(g) CH4(g)  +  H2O(g) What are the units of Kp for this reaction? A kPa B kPa–1 C kPa2 D kPa–2

Accepted Answer

D

Question 11

11 Enzymes are biological catalysts. Many enzymes show specificity. An example of an enzyme which shows specificity is glucokinase. Glucokinase is involved in the metabolism of glucose. What does specificity mean in this context? A Glucokinase is most effective as a catalyst over a narrow pH range. B Glucokinase is most effective as a catalyst over a narrow range of temperatures. C Glucokinase only operates on a narrow range of substrate molecules. D Glucokinase provides an alternative route for the reactions it catalyses.

Accepted Answer

C

Question 12

12 Why is the ionic radius of a chloride ion larger than the ionic radius of a sodium ion? A A chloride ion has one more occupied electron shell than a sodium ion. B Chlorine has a higher proton number than sodium. C Ionic radius increases regularly across the third period. D Sodium is a metal, chlorine is a non-metal.

Accepted Answer

A

Question 13

13 Elements D and E are both in Period 3. Element D has the smallest atomic radius in Period 3. There are only two elements in Period 3 which have a lower melting point than element E. Elements D and E react together to form compound L. Which compound could be L? A MgCl 2 B MgS C Na2S D PCl 3

Accepted Answer

D

Question 14

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

Accepted Answer

A

Question 15

15 The solids sodium chloride and sodium iodide both react with concentrated sulfuric acid at room temperature. With NaCl , the products are NaHSO4 and HCl . With NaI, the products are NaHSO4, HI, I2, SO2, H2O, S and H2S. What is the best explanation for this difference in products? A Chloride ions will displace iodine from solution. B Hydrogen chloride is more volatile than hydrogen iodide. C Iodide ions are better reducing agents than chloride ions. D Sulfuric acid is able to act as a dehydrating agent with NaI.

Accepted Answer

C

Question 16

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.

Accepted Answer

C

Question 17

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

Accepted Answer

B

Question 18

18 Which statement about the ammonia molecule and/or the ammonium ion is correct? A Ammonia molecules are basic because they can donate H+ ions. B Ammonium ions are basic because they can accept H+ ions. C If ammonium ions are heated with NaOH(aq), ammonia molecules are formed. D The bond angle in NH4 + is 2.5° less than the bond angle in NH3.

Accepted Answer

C

Question 19

19 Which reaction does not contribute to the problem of acid rain? A the combustion of fossil fuels B the oxidation of sulfur dioxide to sulfur trioxide catalysed by nitrogen dioxide C the reaction between nitrogen monoxide and carbon monoxide in a catalytic converter D the reaction of sulfur trioxide with water

Accepted Answer

C

Question 20

20 The diagrams show two different compounds. O O 1 2 What is ● the total number of structural isomers, including compound 2, that could be formed by adding a second methyl group to the ring of compound 1, ● the number of π electrons in each compound? number of number of isomers π electrons A 3 2 B 3 4 C 5 2 D 5 4

Accepted Answer

D

Question 21

21 The structural formula of compound X is shown below. O CH3CH2CH2OC H compound X What is the name of compound X and how does its boiling point compare with that of butanoic acid? name of X boiling point of X A methyl propanoate higher than butanoic acid B methyl propanoate lower than butanoic acid C propyl methanoate higher than butanoic acid D propyl methanoate lower than butanoic acid

Accepted Answer

D

Question 22

22 Which pair of reagents will take part in a redox reaction? A CH3CHCH2  +  Br2 B CH3CH2CH2OH  +  concentrated H3PO4 C CH3COCH3  +  HCN D HCO2C2H5  +  dilute H2SO4

Accepted Answer

A

Question 23

23 The first propagation step in the reaction between methane and chlorine is shown. CH4  +  Cl •  →  CH3• +  HCl How many different first propagation steps are possible in the reaction between pentane and chlorine? A 2 B 3 C 4 D 5

Accepted Answer

B

Question 24

24 Alcohol Y gives product Z after mild oxidation. Z gives a positive result with Tollens’ reagent and with 2,4-dinitrophenylhydrazine reagent. What could be the identity of alcohol Y? A butan-1-ol B butan-2-ol C butan-2,3-diol D 2-methylbutan-2-ol

Accepted Answer

A

Question 25

25 A student prepares pentan-1-ol by the alkaline hydrolysis of 1-iodopentane. She gently warms the reaction mixture for 20 minutes. CH3CH2CH2CH2CH2I  +  OH–  →  CH3CH2CH2CH2CH2OH  +  I– When the student uses 1-chloropentane to prepare the same alcohol she has to change the condition of the reaction. Which change in condition should she use and what is the correct reason for its use? change in condition reason A heat under reflux C–Cl bond is more polar than the C–I bond B heat under reflux C–Cl bond is stronger than the C–I bond C room temperature C–Cl bond is more polar than the C–I bond D room temperature C–Cl bond is shorter than the C–I bond

Accepted Answer

B

Question 26

26 Malic acid is found in apples. OH H C CH2CO2H CO2H malic acid Which reagent will react with all three –OH groups present in the malic acid molecule? A ethanol in the presence of concentrated sulfuric acid B potassium hydroxide C sodium D sodium carbonate

Accepted Answer

C

Question 27

27 Cyclic esters are also known as lactones. Delta lactone is used as a solvent and in the manufacture of polyesters. O O delta lactone From which compound could delta lactone be made by a single reaction? A HOCH2CH2CH2CH2CHO B HOCH2CH2CH2CH2CO2H C HOCH2CH2CH2CH2CH2OH D HOCH2CH2CH2CH2CH2CO2H

Accepted Answer

B

Question 28

28 Which reagent cannot be used to distinguish between ethanal and propanone? A acidified sodium dichromate(VI) solution B alkaline aqueous iodine C cold acidified potassium manganate(VII) solution D Fehling’s reagent

Accepted Answer

B

Question 29

29 The ester CH3CH2CH2CO2CH2CH(CH3)2 was hydrolysed under acidic conditions. What are the organic products of this hydrolysis? A butanoic acid and 2-methylpropan-1-ol B butanoic acid and 2-methylpropan-2-ol C butan-1-ol and 2-methylpropanoic acid D propanoic acid and 2-methylpropan-1-ol

Accepted Answer

A

Question 30

30 Geranyl ethanoate is present in ginger and cocoa, and is used in shampoos and soaps as a perfume. It reacts with an excess of bromine in an organic solvent to give X, a bromo-derivative. O Br2 O bromo-derivative geranyl ethanoate X Including geranyl ethanoate, how many cis-trans isomers are there of geranyl ethanoate, and how many chiral centres are there in X? chiral centres cis-trans isomers in X A 2 3 B 2 4 C 4 3 D 4 4

Accepted Answer

A

Question 31

31 X is a particle with 18 electrons and 20 neutrons. What could be the symbol of X? 1 38 Ar 18 2 40 20Ca 2 + 3 39 K + 19

Accepted Answer

A

Question 32

32 What are basic assumptions of the kinetic theory as applied to an ideal gas? 1 Gas particles are in continuous random motion. 2 Gas particles experience no intermolecular forces. 3 The volume of each gas particle is zero.

Accepted Answer

A

Question 33

33 Bromine reacts with water. Br2  +  H2O HOBr  +  HBr Which oxidation states of bromine are present in the equilibrium mixture? 1 +3 2 0 3 –1

Accepted Answer

C

Question 34

34 A little water is added to each of the following compounds and the mixture warmed. For which compounds will an acidic gas be evolved? 1 aluminium chloride 2 silicon tetrachloride 3 phosphorous pentachloride

Accepted Answer

A

Question 35

35 The element astatine, At, is below iodine in Group 17 of the Periodic Table. Which statements concerning At are likely to be correct? 1 It is a dark-coloured solid at room temperature. 2 It is a more powerful oxidising agent than iodine. 3 Its hydride is thermally stable.

Accepted Answer

D

Question 36

36 Which types of reaction can occur with 1-bromobutane? 1 elimination 2 hydrolysis 3 free radical substitution

Accepted Answer

A

Question 37

37 The equation shows a gas phase reaction. X(g)  →  2Y(g) The diagram shows the Boltzmann distribution of a fixed mass of X(g) at temperature T in the absence of a catalyst. The line EA indicates the activation energy. proportion of molecules with a given energy 00 EA molecular energy Which diagrams correctly show the effect of the following changes made separately and independently? 1 adding a catalyst proportion of molecules with a given energy 00 EA molecular energy 2 increasing the pressure of X(g) proportion of molecules with a given energy 00 EA molecular energy 3 increasing the temperature of X(g) proportion of temperature T ' molecules (T ' > T ) with a given temperature T energy 00 EA molecular energy

Accepted Answer

B

Question 38

38 The diagram shows the structure of cyclohexene. cyclohexene Which structures could be formed by addition reactions with cyclohexene as the only reactant? 1 2 3 n n

Accepted Answer

B

Question 39

39 Several steps are involved in the synthesis of 2-hydroxypropanoic acid from ethanol. C2H5OH  →  →  →  CH3CH(OH)CO2H Which statements concerning this synthesis are correct? 1 The chain length can be increased during a step involving reaction between HCN and an aldehyde. 2 The carboxyl group can be made by hydrolysis of a nitrile by boiling with NaOH(aq) and then acidifying. 3 The ethanol should be first oxidised by heating it under reflux with an excess of acidified potassium dichromate(VI).

Accepted Answer

B

Question 40

40 The diagram shows the structure of an addition polymer, X. CH3 H CH3 H CH3 H C C C C C C H CO2CH3 H CO2CH3 H CO2CH3 Which reagents react with polymer X? 1 aqueous sulfuric acid 2 aqueous sodium hydroxide 3 sodium

Accepted Answer

B

Question paper16 pages

Mark scheme2 pages

Questions as text

Q1 · Which equation shows the reaction that occurs during the standard enthalpy change of…

Q2 · What is the correct number of bonds of each type in the Al 2Cl 6 molecule?

Q3 · Tetraethyl lead, Pb(C2H5)4, has been used as a petrol additive

Q4 · When nuclear reactions take place, the elements produced are different from the elements…

Q5 · Dicarbon monoxide, C2O, is found in dust clouds in space

Q6 · A white powder is known to be a mixture of magnesium oxide and aluminium oxide

Q7 · At room temperature and pressure, H2O is a liquid and H2S is a gas

Q8 · Gaseous phosphorus pentachloride can be decomposed into gaseous phosphorus trichloride…

Q9 · An aqueous solution was prepared containing a mixture of 1.0 mol of AgNO3 and 1.0 mol of…

Q10 · The equation for the reaction between carbon monoxide and hydrogen is shown

Q11 · Enzymes are biological catalysts

Q12 · Why is the ionic radius of a chloride ion larger than the ionic radius of a sodium ion?

Q13 · Elements D and E are both in Period 3

Q14 · X and Y are both Group 2 metals

Q15 · The solids sodium chloride and sodium iodide both react with concentrated sulfuric acid…

Q16 · In some areas lime, Ca(OH)2, is added to soil to improve crop growth

Q17 · A piece of rock has a mass of 2.00 g

Q18 · Which statement about the ammonia molecule and/or the ammonium ion is correct?

Q19 · Which reaction does not contribute to the problem of acid rain?

Q20 · The diagrams show two different compounds

Q21 · The structural formula of compound X is shown below

Q22 · Which pair of reagents will take part in a redox reaction?

Q23 · The first propagation step in the reaction between methane and chlorine is shown

Q24 · Alcohol Y gives product Z after mild oxidation

Q25 · A student prepares pentan-1-ol by the alkaline hydrolysis of 1-iodopentane

Q26 · Malic acid is found in apples

Q27 · Cyclic esters are also known as lactones

Q28 · Which reagent cannot be used to distinguish between ethanal and propanone?

Q29 · The ester CH3CH2CH2CO2CH2CH(CH3)2 was hydrolysed under acidic conditions

Q30 · Geranyl ethanoate is present in ginger and cocoa, and is used in shampoos and soaps as a…

Q31 · X is a particle with 18 electrons and 20 neutrons

Q32 · What are basic assumptions of the kinetic theory as applied to an ideal gas?

Q33 · Bromine reacts with water

Q34 · A little water is added to each of the following compounds and the mixture warmed

Q35 · The element astatine, At, is below iodine in Group 17 of the Periodic Table

Q36 · Which types of reaction can occur with 1-bromobutane?

Q37 · The equation shows a gas phase reaction

Q38 · The diagram shows the structure of cyclohexene

Q39 · Several steps are involved in the synthesis of 2-hydroxypropanoic acid from ethanol

Q40 · The diagram shows the structure of an addition polymer, X

What was in this paper

What you needed in this session

Other variants, same session

This paper, other years