plumiAcids, alkalis and acid strength: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 2.1.4.1 Acids, alkalis and acid strength, 2016–2025, with mark schemes and examiner’s reports where available.
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Q1(a)
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All 10 questions on Acids, alkalis and acid strength, as a list
- June 2025, AS Paper 2, Q1(a) (1 mark): Explain what is meant by an alkali. [1]
- June 2024, AS Paper 1, Q22(a) (1 mark): What is the difference between a strong acid and a weak acid? [1]
- June 2023, Paper 1, Q20(d)(ii) (3 marks): Explain why these two reactions of magnesium produce the same volume of gas but at different rates. [3]
- June 2023, AS Paper 1, Q22(a) (1 mark): Hydrochloric acid and nitric acid are classified as strong acids. What is meant by a strong acid? [1]
- June 2022, AS Paper 1, Q3 (1 mark): Which compound is an alkali? A CH3COOH B CH3OH C HNO3 D NH3 Your answer [1]
- June 2022, AS Paper 2, Q1(a)(i) (1 mark): What is meant by an acid? [1]
- June 2022, AS Paper 2, Q1(a)(ii) (1 mark): What is meant by an acid that is weak? [1]
- November 2021, AS Paper 1, Q3 (1 mark): Which compound releases hydroxide ions when it dissolves in water? A CH3COOH B HNO3 C H2SO4 D NH3 Your answer [1]
- June 2018, AS Paper 2, Q1(b) (1 mark): Sodium hydroxide is an alkali. What is meant by the term alkali? [1]
- June 2017, AS Paper 1, Q24(a) (1 mark): Ethanoic acid is a weak acid. What is meant by acid and weak acid? [1]
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