Carboxylic acids: past paper questions
Real questions on carboxylic acids
The newest 20 of 34 written questions. Open one to see it on the real paper.
- 0620/31 · May/June 2026 · Q4a(i)[1]
On Figure 4.1, draw a circle around the carboxylic acid functional group.
See it on the paper → - 0620/42 · May/June 2026 · Q6e(ii)[1]
Give the chemical name of the organic product in method 1.
See it on the paper → - 0620/42 · May/June 2026 · Q6e(iii)[1]
Name the food product in method 2.
See it on the paper → - 0620/32 · February/March 2026 · Q2d(i)[1]
Name the homologous series that includes ethanoic acid.
See it on the paper → - 0620/32 · February/March 2026 · Q2d(ii)[2]
Ethanoic acid reacts with sodium. ethanoic acid + sodium + Complete the word equation for this reaction.
See it on the paper → - 0620/42 · February/March 2026 · Q6a[1]
Deduce the number of different types of amino acid monomers needed to make the part of the protein shown in Figure 6.1.
See it on the paper → - 0620/42 · October/November 2025 · Q6e[1]
Determine the number of unbranched esters which have the molecular formula C 5 H 10 O 2 .
See it on the paper → - 0620/33 · May/June 2025 · Q3b(i)[2]
Draw the displayed formula of a molecule of ethanoic acid.
See it on the paper → - 0620/33 · May/June 2025 · Q3b(ii)[1]
Ethanoic acid reacts with sodium carbonate. Name the salt produced in this reaction.
See it on the paper → - 0620/43 · May/June 2025 · Q5c(i)[1]
Name the carboxylic acid that contains only one carbon atom.
See it on the paper → - 0620/43 · May/June 2025 · Q5c(ii)[1]
State the molecular formula of a carboxylic acid that contains four carbon atoms.
See it on the paper → - 0620/43 · May/June 2025 · Q5d(ii)[2]
Propyl butanoate is an ester. Name the carboxylic acid and alcohol that react to produce propyl butanoate. carboxylic acid
See it on the paper → - 0620/33 · October/November 2024 · Q4a(i)[1]
On Fig 4.1 draw a circle around the carboxylic acid functional group.
See it on the paper → - 0620/42 · February/March 2023 · Q5b[1]
Name the homologous series to which propanoic acid belongs.
See it on the paper → - 0620/42 · February/March 2023 · Q5c[1]
State the general formula of the homologous series to which propanoic acid belongs.
See it on the paper → - 0620/32 · October/November 2022 · Q7a(i)[1]
Choose from the list the word that describes compound T. alcohol alkane alkene carboxylic acid
See it on the paper → - 0620/33 · October/November 2022 · Q7a(i)[1]
On the structure, draw a circle around the carboxylic acid functional group.
See it on the paper → - 0620/43 · May/June 2022 · Q4d(i)[1]
The structure of ester X is shown. H H H H C C C H H H O C O H H C C H H H Name ester X.
See it on the paper → - 0620/43 · May/June 2022 · Q4e[3]
Ester Y has the following composition by mass: C, 58.82%; H, 9.80%; O, 31.37%. Calculate the empirical formula of ester Y. empirical formula =
See it on the paper → - 0620/43 · May/June 2022 · Q4f[1]
Ester Z has the empirical formula C 3 H 6 O and a relative molecular mass of 116. Calculate the molecular formula of ester Z. molecular formula = [Total: 18]
See it on the paper →
What examiners said
Comprehensive responses • Many candidates knew the correct homologous series. Limited responses • Some candidates got confused with the word ‘homologous series’ and named other carboxylic acids.
— Examiner report, February/March 2026, 0620/32 Q2(d)(i) (Cambridge)
Comprehensive responses • Some candidates knew both the correct products of this equation. • Many candidates could work out one product only. Limited responses • Many candidates gave one product as water instead of hydrogen. • Some candidates did not know the correct spelling for the ethanoate ion.
— Examiner report, February/March 2026, 0620/32 Q2(d)(ii) (Cambridge)
Comprehensive responses • Some candidates deduced two amino acid monomers were needed. Limited responses • Most candidates assumed three amino acid monomers were needed.
— Examiner report, February/March 2026, 0620/42 Q6(a) (Cambridge)
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