plumiPreparing and purifying organic solids: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 6.2.5.1 Preparing and purifying organic solids, 2016–2025, with mark schemes and examiner’s reports where available.
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Q18(c)
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Open the full PDFQ17(a)(ii)
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All 7 questions on Preparing and purifying organic solids, as a list
- June 2023, Paper 2, Q18(c) (3 marks): Describe how to purify the impure crystals in Step 3. [3]
- November 2021, Paper 2, Q20(b)(i) (3 marks): Describe how the student could recrystallise the impure crystals to obtain a pure sample of C. [3]
- November 2020, Paper 3, Q1(a)(ii) (2 marks): Draw a labelled diagram to show apparatus set up for filtration under reduced pressure (vacuum filtration). [2]
- June 2019, Paper 3, Q2(e) (2 marks): In Step 3, describe how the student can recrystallise the impure crystals to obtain pure benzoic acid. [2]
- June 2018, Paper 2, Q14 (1 mark): A solid organic compound can be purified by recrystallisation. Which statement(s) about recrystallisation is/are true? 1 The organic compound is more soluble in
- June 2018, Paper 3, Q4(b)(ii) (6 marks): This question is about two compounds used in medicine. (ii)* A chemist prepares a pure solid sample of paracetamol from 4-nitrophenol in two stages: H Stage 1 S
- June 2017, Paper 2, Q17(a)(ii) (6 marks): This question is about the chemistry of aromatic compounds. (ii)* A chemist carries out the reaction in Equation 17.1 using 4.97 g of benzoic acid. The chemist
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