plumiPreparing carboxylic acids: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 15.C.2 Preparing carboxylic acids, 2019–2025, with mark schemes and examiner’s reports where available.
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Q15(a)(i)
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All 13 questions on Preparing carboxylic acids, as a list
- June 2025, Unit 4, Q15(a)(i) (2 marks): Identify the reagent, by name or formula, and the conditions required to carry out Reaction A. (2)
- June 2025, Unit 4, Q15(a)(ii) (1 mark): Name the type of reaction taking place in Reaction B. (1)
- January 2025, Unit 4, Q20(b) (2 marks): Give the laboratory reagents and conditions required to convert glycolic acid, HOCH2COOH, to oxalic acid. Do not consider nitric acid. (2)
- June 2024, Unit 4, Q17(b)(ii) (2 marks): Write the equation for Reaction 2. State symbols are not required. (2)
- June 2024, Unit 5, Q17(c) (3 marks): The final step in the synthesis is shown. N HO O H H H N H N H H State the type of reaction, and the reagent(s) and conditions required. (3) Type Reagent(s) Con
- January 2024, Unit 4, Q18(a) (2 marks): Name the reagent(s) in Step 1 and Step 2. (2) Step 1 Reagent(s) Step 2 Reagent(s)
- June 2023, Unit 4, Q11 (1 mark): Which acid would be produced by the hydrolysis of the molecule shown? N HO A 2-hydroxy-3-methylbutanoic acid B 3-hydroxy-2-methylbutanoic acid C 3-hydroxy-2,3-d
- January 2023, Unit 5, Q20(e)(ii) (1 mark): State how the benzoate ions, C6H5COO– , can be converted into benzoic acid. (1)
- October 2022, Unit 4, Q15(c)(iii) (2 marks): Write the ionic equation for the hydrolysis of X in Step 2. State symbols are not required. (2)
- June 2022, Unit 4, Q5 (1 mark): Which reaction cannot form a carboxylic acid? A oxidation of primary alcohol B acidic hydrolysis of a nitrile C alkaline hydrolysis of an ester D acyl chloride
- October 2021, Unit 4, Q13 (1 mark): Butanoic acid may be prepared by the acid hydrolysis of A butyl ethanoate B 1-chlorobutane C ethyl butanoate D propanenitrile Use this space for any rough worki
- October 2021, Unit 5, Q21(d)(i) (2 marks): State the reagents and conditions needed in Step X. (2)
- June 2021, Unit 4, Q19(a)(iii) (4 marks): Complete the table that summarises information about Step 2. State symbols are not required for the equation. (4) Conversion of CH3CH(OH)CN to lactic acid React
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