Cambridge A Level Chemistry 9701 — 2022 Oct/Nov Paper 1 · Variant 3

Question 1

1 Which sample contains the same number of the named species as the number of molecules in 35.5 g of chlorine? A atoms in 16 g of sulfur B atoms in 23 g of sodium C ions in 74.5 g of potassium chloride D molecules in 88 g of carbon dioxide

Accepted Answer

A

Question 2

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

Accepted Answer

C

Question 3

3 Which statement about the electrons in a ground state carbon atom is correct? A Electrons are present in four different energy levels. B There are more electrons in p orbitals than there are in s orbitals. C The occupied orbital of highest energy is spherical. D The occupied orbital of lowest energy is spherical.

Accepted Answer

D

Question 4

4 For the element sulfur, which pair of ionisation energies has the largest difference between them? A third and fourth ionisation energies B fourth and fifth ionisation energies C fifth and sixth ionisation energies D sixth and seventh ionisation energies

Accepted Answer

D

Question 5

5 How many  bonds are present in one H–C≡C–C(CH3)=CH(CH3) molecule? A 5 B 11 C 13 D 16

Accepted Answer

C

Question 6

6 Which molecule has an equal number of bonding electrons and lone-pair electrons? A BH3 B CO2 C F2O D SO2

Accepted Answer

B

Question 7

7 The table shows properties of four solids held together by different types of bonding. Which row correctly describes the properties of a solid with a giant covalent structure? solubility in melting point polar solvents A high insoluble B high soluble C low insoluble D low soluble

Accepted Answer

A

Question 8

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

Accepted Answer

D

Question 9

9 The enthalpy changes of formation,        , of both PCl 3 and PCl 5 are exothermic. PCl 3 reacts with chlorine. PCl 3(l)  +  Cl 2(g)    PCl 5(s) = –124 kJ mol–1 Which pair of statements is correct? statement 1 statement 2 A is less negative than The Cl 2 bond energy is needed in calculating (PCl 5). from enthalpies of formation. B is more negative than The Cl 2 bond energy is needed in calculating (PCl 5). from enthalpies of formation. C is less negative than The Cl 2 bond energy is not needed in calculating (PCl 5). from enthalpies of formation. D is more negative than The Cl 2 bond energy is not needed in calculating (PCl 5). from enthalpies of formation.

Accepted Answer

C

Question 10

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

Accepted Answer

B

Question 11

11 Ammonium ions are converted into nitrate ions by bacteria. What is the change in the oxidation number of nitrogen? A –6 B +6 C +8 D +9

Accepted Answer

C

Question 12

12 Sodium dichromate(VI), Na2Cr2O7, reacts with hydrogen peroxide, H2O2, producing Cr3+ ions, water and oxygen. What is the correctly balanced ionic equation for this reaction? A Cr2O7 2–  +  2H+  +  H2O2    2Cr3+  +  2H2O  +  4O2 B Cr2O7 2–  +  8H+  +  3H2O2    2Cr3+  +  7H2O  +  3O2 C Cr2O7 2–  +  8H+  +  6H2O2    2Cr3+  +  10H2O  +  6O2 D Cr2O7 2–  +  14H+  +  3H2O2    2Cr3+  +  7H2O  +  3O2

Accepted Answer

B

Question 13

13 In which equilibrium reaction is the position of equilibrium moved to the right-hand side by increasing the temperature and also by decreasing the pressure? A H2(g)  +  CO2(g) H2O(g)  +  CO(g) ∆H = 40 kJ mol–1 B N2O4(g) 2NO2(g) ∆H = 58 kJ mol–1 C 2SO2(g)  +  O2(g) 2SO3(g) ∆H = –197 kJ mol–1 D 2HI(g) H2(g)  +  I2(g) ∆H = –10 kJ mol–1

Accepted Answer

B

Question 14

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

Accepted Answer

A

Question 15

15 A large excess of magnesium ribbon is added to dilute hydrochloric acid and the volume of hydrogen gas produced is measured as the reaction proceeds. The reaction is exothermic. The results are shown. R total volume Q / cm3 P time / s Which row explains the changes in the rate of reaction between points P and Q and between points Q and R? between points P and Q between points Q and R A the reaction temperature is increasing the acid concentration is falling B the reaction temperature is increasing the magnesium has been used up C magnesium’s surface area is decreasing the acid concentration is falling D magnesium’s surface area is decreasing the magnesium has been used up

Accepted Answer

A

Question 16

16 Measurements are made to determine the activation energy, Ea, of a reaction. The diagram shows Ea on the Boltzmann distribution at temperature T1. number of molecules 0 0 Ea energy Measurements are then made at a higher temperature, T2. Which diagram correctly shows the Boltzmann distribution and Ea at T2? A B number of number of molecules molecules 0 0 0 Ea 0 Ea energy energy C D number of number of molecules molecules 0 0 0 Ea 0 Ea energy energy

Accepted Answer

A

Question 17

17 The electrical conductivities of two compounds, Y and Z, are shown. for Y for Z conductivity of the compound good does not in the liquid state conduct conductivity of the mixture obtained good good by adding the compound to water What are compounds Y and Z? Y Z A Al 2O3 SiCl 4 B NaCl Al 2O3 C NaCl SiCl 4 D SiCl 4 Al 2O3

Accepted Answer

C

Question 18

18 Which row describes the relative sizes of the ionic radii of Na+, Mg2+ and S2–? smallest largest A Na+ Mg2+ S2– B Mg2+ Na+ S2– C S2– Na+ Mg2+ D S2– Mg2+ Na+

Accepted Answer

B

Question 19

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

Accepted Answer

A

Question 20

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

Accepted Answer

D

Question 21

21 Which statement about Group 17 elements and compounds is correct? A Sodium chloride produces chlorine when reacted with concentrated sulfuric acid. B Sodium chloride produces chlorine when reacted with bromine. C Sodium bromide produces bromine when reacted with concentrated sulfuric acid. D Sodium bromide produces bromine when reacted with iodine in aqueous potassium iodide.

Accepted Answer

C

Question 22

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

Accepted Answer

B

Question 23

23 Which statement about ammonia or the ammonium ion is correct? A Ammonia gas is produced when an aqueous solution containing the ammonium ion is reacted with a strong acid. B Silver iodide is soluble in a concentrated aqueous solution of ammonia. C The ammonium ion has the same number of electrons as a methane molecule. D The square planar ammonium ion contains a dative covalent bond.

Accepted Answer

C

Question 24

24 Sulfur dioxide can be catalytically oxidised by an oxide of nitrogen in the atmosphere. Which reaction shows how the catalyst is reformed? A N2  +  2O2 2NO2 B 4NH3  +  5O2    4NO  +  6H2O C N2  +  O2    2NO D NO  + 1 O   NO2 2 2

Accepted Answer

D

Question 25

25 Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are added to separate beakers containing water and stirred. The number of beakers containing a white solid is Q. An excess of NaOH(aq) is then added to each beaker and stirred. The number of beakers now containing a white solid is R. Which row is correct? Q R A 3 2 B 3 3 C 4 3 D 4 4

Accepted Answer

D

Question 26

26 Which pair of alcohols are isomers of each other? A butan-1-ol and 2,2-dimethylpropan-1-ol B butan-2-ol and 2-methylpropan-2-ol C pentan-1-ol and 2-methylpropan-2-ol D propan-2-ol and 2-methylpropan-2-ol

Accepted Answer

B

Question 27

27 How many chiral carbon atoms are there in one molecule of 2,2,4,5-tetramethylhexan-3-ol? A 1 B 2 C 3 D 4

Accepted Answer

B

Question 28

28 Which pair of reagents react together in a redox reaction? A CH3CHCH2  +  Br2 B CH3CH2CH2OH  +  concentrated H3PO4 C CH3COCH3  +  HCN D HCO2C2H5  +  dilute H2SO4

Accepted Answer

A

Question 29

29 The structure of santonin is shown. santonin CH3 O CH3 CH3 O O Santonin is first treated with warm dilute H2SO4. The product of this reaction is treated with cold dilute acidified KMnO4. A final product, Q, is obtained. How many atoms of hydrogen in each molecule of product Q will react with sodium metal? A 2 B 4 C 5 D 6

Accepted Answer

D

Question 30

30 Compound R can be formed from 1-bromopropane using a nucleophilic substitution reaction followed by an oxidation reaction. What is the identity of R? A propanoic acid B propanone C propylamine D propyl ethanoate

Accepted Answer

A

Question 31

31 Three colourless liquids with the following formulae are contained in separate unlabelled bottles. CH3CH2CO2H CH3CH(OH)CO2H CH3COCO2H Which two tests, carried out on separate samples of each liquid, will successfully identify each liquid? test 1 test 2 A NaHCO3 2,4-DNPH reagent B NaHCO3 Tollens’ reagent C warm acidified dichromate 2,4-DNPH reagent D warm acidified dichromate Tollens’ reagent

Accepted Answer

C

Question 32

32 An alcohol, X, reacts with a dicarboxylic acid, Y, to form a double ester, Z. The diagram shows the structure of the ester. Z O O O O Which row about the reactants forming ester Z is correct? the class of the shape of alcohol X the ring in Y A secondary non-planar B secondary planar C tertiary non-planar D tertiary planar

Accepted Answer

A

Question 33

33 W reacts with alkaline I2(aq) to form a yellow precipitate and CH3CH2CO2 – ions. Which row identifies W and the yellow precipitate? identity of identity of W yellow precipitate A butanone CHI3 B butanone CH3I C propanone CHI3 D propanone CH3I

Accepted Answer

A

Question 34

34 Ethanal reacts with hydrogen cyanide in the presence of KCN to produce a hydroxynitrile.

What is the first step in the mechanism of this reaction?

A B c D
0 0 0 0
H*
In, Cl C| |“
st+C ~=CN sC aC tC
H,cC~ H H.07/ ™“H H,c~ oH H,cC~ H

2CN- chi

Accepted Answer

B

Question 35

35 Structural isomerism and stereoisomerism should be considered when answering this question. How many isomeric compounds with molecular formula C5H6O4 contain two –CO2H groups and one C=C double bond? A 5 B 6 C 7 D 8

Accepted Answer

C

Question 36

36 Compound X reacts with ethanoic acid in the presence of an H+ catalyst to produce the compound shown. O H H O H3C C C C O C CH3 H H What is the molecular formula of compound X? A C2H4O B C2H6O2 C C4H8O D C4H8O2

Accepted Answer

D

Question 37

37 2-bromopropane reacts with hot ethanolic sodium hydroxide. Which substance is the major product of this reaction? A propan-1-ol B propan-2-ol C 2-hydroxypropene D propene

Accepted Answer

D

Question 38

38 Which compounds can be used to make Y in a single-step reaction? Y O OH 1 propanenitrile 2 ethanenitrile 3 propyl ethanoate 4 ethyl propanoate A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4

Accepted Answer

B

Question 39

39 The monomer buta-1,3-diene can undergo addition polymerisation in various ways. Two of the polymers that can be made are called cis-poly(buta-1,3-diene) and trans-poly(buta-1,3-diene). In these names cis and trans have their usual meanings. What is the structure of the repeat unit of cis-poly(buta-1,3-diene)? A B C D n n n n

Accepted Answer

C

Question 40

40 In the mass spectrum of a compound, Z, the relative abundances of the M and M+1 peaks are in the ratio 13 : 1. What is compound Z? A butyl butanoate B hexan-3-one C 2,2,3-trimethylhexane D 3,3-dimethylpentan-1-ol

Accepted Answer

D

Question paper16 pages

Mark scheme3 pages

Questions as text

Q1 · Which sample contains the same number of the named species as the number of molecules in…

Q2 · Mixture R consists of one mole of C3H6 and one mole of C4H6

Q3 · Which statement about the electrons in a ground state carbon atom is correct?

Q4 · For the element sulfur, which pair of ionisation energies has the largest difference…

Q5 · How many  bonds are present in one H–C≡C–C(CH3)=CH(CH3) molecule?

Q6 · Which molecule has an equal number of bonding electrons and lone-pair electrons?

Q7 · The table shows properties of four solids held together by different types of bonding

Q8 · The carbonate of an s-block element is reacted with an excess of hydrochloric acid

Q9 · The enthalpy changes of formation, , of both PCl 3 and PCl 5 are exothermic

Q10 · A student mixes 25.0 cm3 of 0.350 mol dm–3 sodium hydroxide solution with 25.0 cm3 of…

Q11 · Ammonium ions are converted into nitrate ions by bacteria

Q12 · Sodium dichromate(VI), Na2Cr2O7, reacts with hydrogen peroxide, H2O2, producing Cr3+…

Q13 · In which equilibrium reaction is the position of equilibrium moved to the right-hand side…

Q14 · Ethanol is produced industrially by reacting ethene and steam

Q15 · A large excess of magnesium ribbon is added to dilute hydrochloric acid and the volume of…

Q16 · Measurements are made to determine the activation energy, Ea, of a reaction

Q17 · The electrical conductivities of two compounds, Y and Z, are shown

Q18 · Which row describes the relative sizes of the ionic radii of Na+, Mg2+ and S2–?

Q19 · The oxides BaO, CaO, MgO and SrO all produce alkaline solutions when added to water

Q20 · Which row is correct?

Q21 · Which statement about Group 17 elements and compounds is correct?

Q22 · Chlorine is bubbled through 100 cm3 of hot 4.0 mol dm–3 sodium hydroxide until the…

Q23 · Which statement about ammonia or the ammonium ion is correct?

Q24 · Sulfur dioxide can be catalytically oxidised by an oxide of nitrogen in the atmosphere

Q25 · Separate 1.0 g samples of Na2O, MgO, Al 2O3, SiO2, NaCl, MgCl 2, Al 2Cl 6 and SiCl 4 are…

Q26 · Which pair of alcohols are isomers of each other?

Q27 · How many chiral carbon atoms are there in one molecule of 2,2,4,5-tetramethylhexan-3-ol?

Q28 · Which pair of reagents react together in a redox reaction?

Q29 · The structure of santonin is shown

Q30 · Compound R can be formed from 1-bromopropane using a nucleophilic substitution reaction…

Q31 · Three colourless liquids with the following formulae are contained in separate unlabelled…

Q32 · An alcohol, X, reacts with a dicarboxylic acid, Y, to form a double ester, Z

Q33 · W reacts with alkaline I2(aq) to form a yellow precipitate and CH3CH2CO2 – ions

Q34 · Ethanal reacts with hydrogen cyanide in the presence of KCN to produce a hydroxynitrile

Q35 · Structural isomerism and stereoisomerism should be considered when answering this question

Q36 · Compound X reacts with ethanoic acid in the presence of an H+ catalyst to produce the…

Q37 · 2-bromopropane reacts with hot ethanolic sodium hydroxide

Q38 · Which compounds can be used to make Y in a single-step reaction?

Q39 · The monomer buta-1,3-diene can undergo addition polymerisation in various ways

Q40 · In the mass spectrum of a compound, Z, the relative abundances of the M and M+1 peaks are…

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