plumiHomologous series and functional groups: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 4.1.1.2 Homologous series and functional groups, 2016–2025, with mark schemes and examiner’s reports where available.
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All 19 questions on Homologous series and functional groups, as a list
- June 2025, Paper 2, Q1 (1 mark): Which compound is alicyclic and unsaturated? A B C D Your answer [1]
- June 2025, Paper 2, Q21(a) (1 mark): What is a functional group? [1]
- June 2024, Paper 2, Q16(a) (1 mark): Which hydrocarbons are unsaturated? [1]
- June 2024, Paper 2, Q16(b) (1 mark): Which hydrocarbons are alicyclic? [1]
- June 2024, Paper 2, Q16(c) (1 mark): Which hydrocarbons have the general formula CnH2n? [1]
- June 2024, AS Paper 1, Q15 (1 mark): The structure of a hydrocarbon is shown below. Which terms describe this hydrocarbon? A Alicyclic and saturated B Aliphatic and alicyclic C Aliphatic and aromat
- June 2024, AS Paper 1, Q18 (1 mark): Which functional groups are present in the compound below? O O OH A Alcohol and aldehyde. B Alcohol and ketone. C Carboxylic acid and aldehyde. D Carboxylic aci
- June 2023, Paper 2, Q3 (1 mark): Propyne, CH3C≡CH, is a member of the alkynes homologous series with the C≡C functional group. What is the general formula of the alkynes? A CnH2n–4 B CnH2n–2 C
- June 2023, Paper 2, Q13 (1 mark): Which compound(s) is/are aliphatic? 1 2 3 A 1, 2 and 3 B Only 1 and 2 C Only 2 and 3 D Only 1 Your answer [1]
- November 2021, AS Paper 1, Q18 (1 mark): The ‘dienes’ are a homologous series of non-cyclic compounds with two double bonds. The simplest diene is shown below. What is the general formula of the dienes
- November 2020, Paper 2, Q19(a)(i) (2 marks): Explain the term homologous series. [2]
- November 2020, Paper 2, Q19(a)(ii) (1 mark): Predict the molecular formula for the member of this homologous series containing 24 carbon atoms. [1]
- November 2020, AS Paper 1, Q25(c)(i) (2 marks): Explain what is meant by the term: homologous series. [2]
- November 2020, AS Paper 1, Q25(c)(ii) (1 mark): Suggest the general formula of the alkynes. [1]
- June 2019, AS Paper 1, Q15 (1 mark): Which compound is unsaturated, alicyclic and contains an alkyl group? A B C D Your answer [1]
- June 2018, Paper 2, Q4 (1 mark): Which structure represents an alicyclic compound? A B C D Your answer [1]
- June 2017, Paper 2, Q2 (1 mark): How can the molecule below be described? OH A Aromatic and alicyclic B Aliphatic and unsaturated C Aromatic and unsaturated D Alicyclic and saturated Your answe
- June 2017, AS Paper 2, Q5(a) (1 mark): Suggest the general formula for a carboxylic acid. [1]
- June 2016, AS Paper 1, Q26(a)(i) (1 mark): Compound B is a member of a homologous series. Name the homologous series and state its general formula. Homologous series General formula [1]
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