plumiTests for organic functional groups: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 6.3.1.2 Tests for organic functional groups, 2016–2025, with mark schemes and examiner’s reports where available.
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All 11 questions on Tests for organic functional groups, as a list
- June 2025, Paper 2, Q14 (1 mark): The structure of vitamin C is shown. HO OH OH O O OH Which reagent(s) will react with vitamin C? 1 Aqueous bromine water Acidified potassium dichromate(VI) 2 3
- June 2025, Paper 2, Q21(c) (3 marks): A student is provided with three unlabelled sample tubes, containing either pyruvic acid, methylglyoxal or acetol. The student carries out three chemical tests
- June 2024, Paper 2, Q5 (1 mark): Geraniol, shown below, is a component in many natural oils. OH Geraniol Which pair of reagents identifies both functional groups in geraniol? Acidified dichroma
- June 2024, Paper 3, Q5(b)(ii) (6 marks): This question is about the analysis of organic compounds. (ii)* The student is provided with further information about compounds F–I. • They all have the molecu
- June 2022, Paper 2, Q20(a)(i) (1 mark): What chemical test(s) could be used to confirm the presence of the phenol group in compounds K and L? [1]
- November 2021, Paper 2, Q21 (6 marks): 21* Compounds D, E and F are isomers with the molecular formula C5H10O. One of the compounds is alicyclic. A student carries out test-tube tests on the compound
- November 2020, Paper 2, Q19(b) (4 marks): Describe suitable chemical tests, with observations, that would confirm the presence of the functional groups in F and G. [4]
- June 2019, Paper 3, Q4(a)(iii) (2 marks): Name the functional group responsible for the acidity of chloroxylenol and describe a simple test which would confirm the presence of this group. Functional gro
- June 2018, Paper 2, Q20(b)(i) (1 mark): Suggest a suitable chemical test to confirm that both compounds contain an unsaturated carbon chain. Your answer should include the reagent and observations. [1
- June 2017, Paper 2, Q20(b) (3 marks): Qualitative tests are carried out on the aromatic compound. The results are shown below. Test Acidity Na2CO3(aq) 2,4-DNP Tollens’ reagent No observable No obser
- June 2017, Paper 3, Q5(b) (6 marks): This question is about organic molecules that have a strong smell. (b)* The structures for six naturally occurring organic compounds with pleasant smells, B–G,
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