plumiNitriles and extending carbon chains: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 6.2.4.1 Nitriles and extending carbon chains, 2016–2025, with mark schemes and examiner’s reports where available.
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Q19(a)(i)
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All 11 questions on Nitriles and extending carbon chains, as a list
- June 2025, Paper 2, Q19(a)(i) (3 marks): Outline the mechanism for the reaction of 2-bromopropane with cyanide ions. Show curly arrows, relevant dipoles and products. Br [3]
- June 2025, Paper 2, Q19(a)(ii) (1 mark): Name this type of mechanism. [1]
- June 2024, Paper 2, Q18(b) (9 marks): Complete the flowchart by filling in each box. amine reagent(s) reagent(s) H H3C C Br H bromoethane alcohol reagent(s) H H3C C C N H nitrile reagent(s) reagent(
- June 2022, Paper 2, Q19(b) (4 marks): The structure of 2-hydroxybutanoic acid is shown below. H CH3CH2 C COOH OH 2-hydroxybutanoic acid Fill in the flowchart for reactions involving 2-hydroxybutanoi
- June 2022, Paper 2, Q21 (6 marks): 21* Carbon-carbon bond formation is used in synthesis to increase the length of a carbon chain. Describe the formation of carbon–carbon bonds in aliphatic compo
- November 2021, Paper 2, Q19(b) (6 marks): This question is about organic synthesis. (b)* A student intends to synthesise compound A using the two-stage route below. O Stage 1 Stage 2 CH2 Cl Intermediate
- June 2019, Paper 2, Q19(b)(iv) (7 marks): Complete the flowchart for the synthesis of compounds D and E from phenylethanone. O H3C C NaBH4 phenylethanone NaCN(aq) / H+(aq) H C H H C CH3 compound D Br C
- June 2018, Paper 2, Q15 (1 mark): Which of the following could react with the compound below to form a carbon–carbon bond? H O C C OH Br 1 CH3Cl and Al Cl3 2 KCN in ethanol 3 CH3OH and H2SO4 A 1
- June 2018, Paper 2, Q20(c) (5 marks): The flowchart below shows some reactions starting with cinnamaldehyde. Draw the structures of the missing organic compounds in the boxes and add the missing rea
- June 2017, Paper 2, Q18(a)(i) (3 marks): 1-Chloropropane, CH3CH2CH2Cl, reacts with ethanolic sodium cyanide by nucleophilic substitution. Outline the mechanism for this reaction. Include curly arrows,
- June 2017, Paper 2, Q18(a)(ii) (3 marks): Compound G is used to synthesise compounds H and I as shown in the flowchart below. Complete the flowchart showing the structure of compound G and the formulae
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