plumiAcyl chlorides in synthesis: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 6.1.3.3 Acyl chlorides in synthesis, 2016–2025, with mark schemes and examiner’s reports where available.
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All 12 questions on Acyl chlorides in synthesis, as a list
- June 2025, Paper 2, Q9 (1 mark): Which reagents could a student use to prepare the ester shown? O CH3CH2 C O O A OH CH3CH2 C + HO CH3CH2 OH + HOOC B C CH3CH2CH2 OH + HOOC O D CH3CH2 C Cl + HO Y
- June 2025, Paper 2, Q18(c) (2 marks): 3-Hydroxybutanoic acid reacts with ethanoic anhydride, (CH3CO)2O. Complete the equation for this reaction. Show the structures of the organic compounds. CH3 O O
- June 2025, Paper 2, Q21(e) (7 marks): Complete the flowchart for the reactions of pyruvic acid. excess NH3 Acyl chloride Compound P reagent(s) O NaOH(aq) O OH Pyruvic acid CH3OH / H2SO4 reagent(s) O
- June 2024, Paper 2, Q20(b)(ii) (4 marks): Ester F can be prepared from a carboxylic acid in two steps. Step 1 The carboxylic acid is converted into an acyl chloride. Step 2 The acyl chloride is converte
- June 2023, Paper 2, Q12 (1 mark): Which compound reacts with ethanoyl chloride? O A O B O Cl C O D NH2 O Your answer [1]
- June 2023, Paper 2, Q20(a) (4 marks): Salicylic acid, shown below, is used in the manufacture of some important medicines. COOH OH Salicylic acid Complete the flowchart for reactions of salicylic ac
- June 2022, Paper 2, Q20(f) (2 marks): Acid anhydrides react in a similar way to acyl chlorides with phenols. Benzoic anhydride is the acid anhydride of benzoic acid, C6H5COOH. Benzoic anhydride reac
- November 2021, Paper 3, Q5(c) (6 marks): This question is about nitrogen and its compounds. (c)* This question is about two reactions of ammonia. Reaction 1 Excess ammonia is reacted with 4.77 g of cop
- November 2020, Paper 2, Q18(b)(iii) (3 marks): A large yield of polymer E can be obtained by reacting a diacyl dichloride with HO(CH2)4OH. The diacyl dichloride is prepared from HOOC(CH2)2COOH. Complete the
- June 2018, Paper 2, Q21(b) (4 marks): Compound H is used in the synthesis of polymer I, as shown in the flowchart below. Complete the flowchart by drawing the structure of the acyl chloride and two
- June 2017, Paper 2, Q10 (1 mark): Equal amounts of the four compounds are added to the same volume of water. Which compound would produce the most acidic solution? A CH3CONH2 B CH3COOH C CH3COOC
- June 2017, Paper 2, Q13 (1 mark): Which reagents could be used to prepare CH3CH2CONHCH3? A CH3CH2COCl + CH3NH2 B CH3CH2CONH2 + CH3Br C CH3CH2COONa + CH3NH2 D CH3CH2COCH3 + NH3 Your answer [1]
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