Alcohols and carboxylic acids: Eduqas A‑Level Chemistry questions

Every Eduqas A-Level Chemistry exam question on C3.4 Alcohols and carboxylic acids, 2016–2025, with its mark scheme and examiner’s report.

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Q3(b)
June 2025 · Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q7(a)(iii)
June 2025 · Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q7(a)(iv)
June 2025 · Component 2
3 marksC3.4 Alcohols and carboxylic acids
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Q7(b)(i)
June 2025 · Component 2
4 marksC3.4 Alcohols and carboxylic acids
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Q7(c)(i)
June 2025 · Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q11(a)(ii)
June 2025 · Component 2
4 marksC3.5 Instrumental analysis C3.4 Alcohols and carboxylic acids
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Q8(b)(i)
June 2025 · AS Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q8(b)(ii)
June 2025 · AS Component 2
3 marksC3.4 Alcohols and carboxylic acids
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Q8(c)(i)
June 2025 · AS Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q8(c)(ii)
June 2025 · AS Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q8(c)(iii)
June 2025 · AS Component 2
2 marksC3.4 Alcohols and carboxylic acids
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Q8(d)
June 2025 · AS Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q3
June 2024 · Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q5(b)
June 2024 · Component 2
2 marksC3.4 Alcohols and carboxylic acids C1.3 Chemical calculations
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Q9(c)(ii)
June 2024 · Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q11(a)(ii)
June 2024 · Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q4
June 2024 · AS Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q8(a)(ii)
June 2024 · AS Component 2
1 markC3.4 Alcohols and carboxylic acids
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Q8(a)(iii)
June 2024 · AS Component 2
2 marksC3.4 Alcohols and carboxylic acids
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Q8(a)(v)
June 2024 · AS Component 2
3 marksC3.4 Alcohols and carboxylic acids C2.1 Simple equilibria and acid-base reactions
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All 71 questions on Alcohols and carboxylic acids, as a list

June 2025, Component 2, Q3(b) (1 mark): Use your answer to part (a) to suggest a structure for this compound. [1]
June 2025, Component 2, Q7(a)(iii) (1 mark): Compound W is a tertiary alcohol. Deduce its structure. [1]
June 2025, Component 2, Q7(a)(iv) (3 marks): I. State a dehydrating agent that will react with compound W to give an alkene. [1] II. Give the systematic name and the structure of an alkene produced by the
June 2025, Component 2, Q7(b)(i) (4 marks): The compounds shown below are two of many with the molecular formula C4H8O2 H H O H H H H O HO C C C C H H C C C C OH H H H H H H 4-hydroxybutan-2-one butanoic
June 2025, Component 2, Q7(c)(i) (1 mark): In industry, butanoic acid is obtained by oxidation of butan-1-ol. To separate the acid, a saturated solution of calcium chloride is added, giving calcium butan
June 2025, Component 2, Q11(a)(ii) (4 marks): Pivalic acid reacts with methanol to give the ester methyl pivalate, (CH3)3CC(O)OCH3 I. State a catalyst used for this reaction. [1] II. Describe the high reso
June 2025, AS Component 2, Q8(b)(i) (1 mark): The hydration of ethene is typically carried out using a catalyst of phosphoric acid at a pressure of 70 atm. State the temperature used in this reaction. [1]
June 2025, AS Component 2, Q8(b)(ii) (3 marks): Using the fermentation method, the ethanol is separated by distillation. Complete and label the diagram of the apparatus used in a laboratory to carry out a sim
June 2025, AS Component 2, Q8(c)(i) (1 mark): It can be dehydrated to form ethene. Name a suitable dehydrating agent for this reaction. [1]
June 2025, AS Component 2, Q8(c)(ii) (1 mark): It can be oxidised by acidified potassium dichromate(VI) to form ethanoic acid. State what you would observe during this reaction. [1]
June 2025, AS Component 2, Q8(c)(iii) (2 marks): I. Classify the type of reaction taking place when ethanol reacts with propanoic acid using sulfuric acid as a catalyst. [1] II. Draw the structure of the orga
June 2025, AS Component 2, Q8(d) (1 mark): Ethanoic acid reacts with sodium hydroxide to form sodium ethanoate and water. Write an equation for this reaction. [1]
June 2024, Component 2, Q3 (1 mark): State the name of an alcohol that produces phenylethene when it is dehydrated by heating with sulfuric acid. [1]
June 2024, Component 2, Q5(b) (2 marks): Use your answer to (a) to find the relative molecular mass of the R group and hence the formula of the alcohol. [2]
June 2024, Component 2, Q9(c)(ii) (1 mark): State the name of a catalyst that can be used in route 2 [1]
June 2024, Component 2, Q11(a)(ii) (1 mark): Suggest the type of reaction that is occurring during the decomposition of this trihydric alcohol. [1]
June 2024, AS Component 2, Q4 (1 mark): State what is meant by a tertiary alcohol. [1]
June 2024, AS Component 2, Q8(a)(ii) (1 mark): Give the reagent(s) required to convert compound C to compound D. [1]
June 2024, AS Component 2, Q8(a)(iii) (2 marks): Give one chemical test, apart from use of an indicator, which could be used to confirm that compound D is a carboxylic acid. Your answer should include reagent(
June 2024, AS Component 2, Q8(a)(v) (3 marks): Compound A can be converted directly to compound C under suitable conditions. A(g) + H2O(g) C(g) ΔHθ = – 46 kJ mol–1 I. Name the catalyst used in this reaction.
June 2024, AS Component 2, Q8(b) (4 marks): E and F are both straight-chained compounds. The infrared spectrum of compound E is shown below. % Transmittance 100 80 60 40 20 0 4000 3500 3000 2500 2000 1500
June 2024, AS Component 2, Q10(a)(i) (1 mark): Write a balanced equation for this reaction. Use [O] to represent the oxidising agent. [1]
June 2024, AS Component 2, Q10(a)(ii) (5 marks): The student sets up the apparatus as shown in the diagram. You may assume that all the equipment is safely clamped. water out water in ethanol and oxidising age
June 2024, AS Component 2, Q10(c) (1 mark): Give the equation for the reaction between ethanoic acid and sodium hydroxide. [1]
Autumn 2021, Component 2, Q6(b)(iii) (2 marks): The hexan-1-ol layer, containing the dissolved propanoic acid, was then refluxed to produce the ester 1-hexyl propanoate. Give the equation for the reaction bet
Autumn 2021, Component 2, Q7(d)(i) (1 mark): Explain why the temperature at the top of the column was kept at 90 °C or below. [1]
Autumn 2021, Component 2, Q7(d)(ii) (1 mark): Suggest why the conical flask containing cyclohexene had a loose cotton wool plug rather than being secured by a stopper. [1]
Autumn 2021, Component 2, Q7(d)(iii) (2 marks): The cyclohexene distillate was not pure. Suggest and explain what other compound could be present in the distillate. [2]
Autumn 2021, Component 2, Q7(d)(v) (1 mark): After the experiment the liquid left in the reaction flask contained unreacted cyclohexanol, aqueous sulfuric acid and the compound whose formula is shown below
Autumn 2021, Component 3, Q2(f)(ii) (2 marks): State the reagent(s) necessary for the oxidation of C and D in the laboratory. Give the expected observation(s) as the reaction proceeds. [2] Reagent(s) Obser
Autumn 2020, Component 2, Q3(b) (3 marks): Complete each box in the table by giving an observation. If there is no observation, write ‘no reaction’. [3] Reagent added Compound Aqueous sodium Acidified po
Autumn 2020, Component 2, Q5(b) (1 mark): State a reagent for the following reaction. [1] H H O C OH C O C CH3 H H
Autumn 2020, Component 2, Q9(e)(iii) (2 marks): Stage 2 is an oxidation reaction. Using [O] to represent the formula of the oxidising agent, complete the equation below. [2] H H O O HO C(CH2)4C OH + [O] C(CH2
Autumn 2020, Component 3, Q1(d)(i) (1 mark): Give the essential reaction conditions. [1]
Autumn 2020, Component 3, Q1(d)(ii) (1 mark): Give the equation for the reaction. Clearly show the structure of the ester formed. [1]
Autumn 2020, Component 3, Q1(d)(iii) (1 mark): State how the ester is separated from the reaction mixture. [1]
Autumn 2020, AS Component 2, Q5 (1 mark): Complete the equation for the reaction between propanoic acid and sodium carbonate. [1] 2C2H5COOH + Na2CO3
Autumn 2020, AS Component 2, Q7(a) (2 marks): Biogas refers to a mixture of different gases produced by the breakdown of organic matter in the absence of oxygen. Its main component is methane. Suggest why b
Autumn 2020, AS Component 2, Q9(a) (7 marks): Compound X is an alcohol. When compound X is warmed with acidified potassium dichromate(VI) there is a colour change. In the mass spectrum of compound X • the m
June 2019, Component 2, Q5 (1 mark): Draw the displayed formula of the ionic compound calcium ethanoate, (CH3COO)2Ca. [1]
June 2019, Component 2, Q9(c)(iii) (1 mark): Menthol is a secondary alcohol. Suggest the skeletal formula of menthone, C10H18O, which is formed by the oxidation of menthol. [1]
June 2019, Component 2, Q12(b)(ii) (1 mark): In the first stage of the mechanism of this reaction, 2-methylbutan-2-ol acts as a base. Suggest how it can react as a base. [1]
June 2019, Component 2, Q12(b)(iii) (1 mark): The main organic product of the reaction is 2-methylbut-2-ene but a small — percentage of 2-methylbut-1-ene, CH3CH2 C(CH3) CH2 is also produced. — Suggest why t
June 2019, Component 2, Q12(b)(vi) (1 mark): In this reaction the alcohol is added slowly to an excess of sulfuric acid. However, if sulfuric acid is added slowly to the alcohol, then the product below is
June 2019, AS Component 2, Q4(b) (1 mark): State why it is classified as a secondary alcohol. [1]
June 2019, AS Component 2, Q7 (1 mark): Ethanoic acid, CH3COOH, is a typical organic acid. Write the equation for the reaction between ethanoic acid and magnesium oxide. [1]
June 2019, AS Component 2, Q10(a)(i) (1 mark): Write an equation for this reaction. [1] Use [O] to represent the oxidising agent and show the structure of the organic product.
June 2019, AS Component 2, Q10(a)(ii) (4 marks): Describe, giving brief experimental details, how he can carry out the reaction. [4]
June 2019, AS Component 2, Q10(a)(iii) (2 marks): Ethanol can also be oxidised to ethanoic acid. Describe how the student could use a chemical test to confirm that his sample of ethanal did not contain ethanoic
June 2019, AS Component 2, Q10(c)(ii) (1 mark): Give a disadvantage of biofuels compared with fossil-based fuels. [1]
June 2018, Component 2, Q11(b)(ii) (2 marks): State the role of sulfuric acid when it reacts with compound F and explain why two products are formed. [2]
June 2018, AS Component 2, Q1 (1 mark): Ethanol is produced industrially by hydration of ethene. The reaction is typically carried out using a catalyst at 300 °C and 70 atm pressure. Name the catalyst
June 2018, AS Component 2, Q8(a)(ii) (7 marks): Identify compounds A-E giving your reasoning. [7]
June 2018, AS Component 2, Q8(b)(iii) (2 marks): Draw the structure of an organic product formed when geraniol reacts with I. Br2 [1] II. CH3COOH in the presence of sulfuric acid [1]
June 2018, AS Component 2, Q9(e) (3 marks): A student was given separate samples of pentan-2-ol and 2-methylbutan-2-ol but was not told which was which. Describe a chemical test that the student could use
June 2018, AS Component 2, Q9(f)(i) (2 marks): An incomplete diagram of the distillation apparatus is shown below. heat Complete the diagram by drawing a thermometer and clearly labelled arrows to show the f
June 2017, Component 2, Q12(a)(ii) (3 marks): The oxidation of 2-chloroethanol (Mr 80.6) produces chloroethanoic acid together with a little chloroethanal. H O ClCH2 C H ClCH2 C OH OH 5.80 g of chloroethano
June 2017, Component 2, Q13(d)(i) (1 mark): State a dehydrating agent for this reaction. [1]
June 2017, AS Component 2, Q3 (1 mark): Describe the difference in structure between a primary and a secondary alcohol. [1]
June 2017, AS Component 2, Q6 (2 marks): Give a chemical test which could be used to show the presence of a carboxylic acid group, —COOH. Your answer should include all reagents and observations. [2]
June 2017, AS Component 2, Q8(a)(i) (2 marks): Name the type of reaction taking place, giving a suitable reagent. [2]
June 2017, AS Component 2, Q8(a)(ii) (4 marks): Draw a labelled diagram of the apparatus you would use for heating under reflux. Explain how this apparatus prevents the escape of vapour. [4]
June 2017, AS Component 2, Q8(a)(iii) (2 marks): Give two reasons why the escape of vapour should be prevented. [2]
June 2017, AS Component 2, Q8(a)(v) (2 marks): In another experiment, the same reaction mixture was only gently heated and the product distilled off as it was formed. Explain why ethanoic acid is not produce
June 2017, AS Component 2, Q9(a)(ii) (2 marks): Draw a displayed formula for the compound and give its systematic name. [2] Name
June 2017, AS Component 2, Q9(b) (6 marks): Ethanol is normally produced worldwide by hydration of ethene obtained from crude oil. C2H4(g) + H2O(g) a C2H5OH(g) ΔH = –46 kJ mol–1 This reaction is typically
June 2017, AS Component 2, Q9(c) (2 marks): Ethanol can form ethene by a dehydration reaction. Name a suitable reagent for this reaction and state how you would expect the infrared absorption spectrum of
June 2016, AS Component 2, Q6(a)(i) (2 marks): and (ii). (i) Name compounds B and C. [2]
June 2016, AS Component 2, Q6(a)(ii) (1 mark): Give the formula of compound E. [1]
June 2016, AS Component 2, Q6(a)(iii) (5 marks): By considering all the alcohols of formula C4H10O, state if you agree with Geoff’s conclusion. Give reasons to justify your answer. [5]
June 2016, AS Component 2, Q6(a)(iv) (3 marks): Draw a labelled diagram of the apparatus Geoff should use to carry out the distillation in test 3 [3]

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