Formulae, functional groups and terminology: past paper questions
Real questions on formulae, functional groups and terminology
The newest 20 of 86 written questions. Open one to see it on the real paper.
- 5070/21 · October/November 2025 · Q1a(v)[1]
is formed by the reaction between methanol and propanoic acid.
See it on the paper → - 5070/21 · October/November 2025 · Q1b[1]
State which two compounds have the same molecular formula. and
See it on the paper → - 5070/22 · October/November 2025 · Q1a(i)[1]
is methanoic acid (i)
See it on the paper → - 5070/21 · May/June 2025 · Q4a[1]
Give the general formula of the homologous series of alcohols.
See it on the paper → - 5070/21 · May/June 2025 · Q4b[2]
Members of a homologous series have the same general formula and share similar chemical properties. State two other general characteristics of a homologous series.
See it on the paper → - 5070/21 · May/June 2025 · Q4d[2]
State two uses for ethanol.
See it on the paper → - 5070/21 · May/June 2025 · Q4e[3]
Describe the manufacture of ethanol from ethene. Include the other reactant and the conditions for the manufacture.
See it on the paper → - 5070/21 · May/June 2025 · Q5a[1]
Petrol is a mixture of hydrocarbons which includes octane, C 8 H 18 . Explain why octane is a hydrocarbon.
See it on the paper → - 5070/21 · May/June 2025 · Q8d[1]
Fig. 8.2 shows compound B. H H C H H C C H O C C H O H H Fig. 8.2 Explain why methylbut‑2‑enoate and compound B are a pair of structural isomers.
See it on the paper → - 5070/21 · October/November 2024 · Q4a[2]
But-1-ene belongs to the alkene homologous series. Members of the same homologous series differ from one member to the next by a –CH 2 – group and have similar chemical properties. State two other characteristics of a homologous series.
See it on the paper → - 5070/21 · October/November 2024 · Q4b(i)[1]
Explain how Fig. 4.1 shows that but-1-ene is an unsaturated compound.
See it on the paper → - 5070/22 · October/November 2024 · Q7a(i)[1]
State the name given to a formula such as C n H 2n O 2 .
See it on the paper → - 5070/22 · October/November 2024 · Q7a(ii)[1]
Deduce the value of n in the ester propyl ethanoate.
See it on the paper → - 5070/22 · October/November 2024 · Q7b[1]
Draw the displayed formula of ethyl butanoate. (b) The ester ethyl butanoate is produced by reacting ethanol with butanoic acid.
See it on the paper → - 5070/21 · May/June 2024 · Q1e[1]
has the empirical formula CH 2 O.
See it on the paper → - 5070/21 · May/June 2024 · Q2c(i)[1]
Explain why ethyne is a hydrocarbon.
See it on the paper → - 5070/21 · May/June 2024 · Q2c(ii)[1]
Suggest why ethyne is unsaturated.
See it on the paper → - 5070/21 · May/June 2024 · Q2c(iii)[1]
Aqueous bromine reacts with ethyne. Predict the colour change that happens during this reaction.
See it on the paper → - 5070/21 · May/June 2024 · Q2c(iv)[2]
Draw a dot-and-cross diagram to show the electronic configuration in a molecule of ethyne. Show only the outer shell electrons.
See it on the paper → - 5070/22 · May/June 2024 · Q1e[1]
has the empirical formula CH 2 O.
See it on the paper →
What examiners said
Amino acid was not well known. Common responses included: amide; carboxylic acid and nylon. A significant number omitted the question.
— Examiner report, October/November 2023, 5070/21 Q5(d)(i) (Cambridge)
Common incorrect responses included nylon and ester. A significant number omitted the question.
— Examiner report, October/November 2023, 5070/21 Q5(d)(ii) (Cambridge)
Many candidates chose methane but ammonia and nitrogen dioxide were common incorrect answers.
— Examiner report, October/November 2023, 5070/22 Q1(a) (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.