plumiBase properties: AQA A‑Level Chemistry questions
AQA A-Level Chemistry past-paper questions on 3.3.11.2 Base properties, 2008–2025, with mark schemes and examiner’s reports where available.
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Q09.4
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All 15 questions on Base properties, as a list
- June 2024, Paper 2, Q09.4 (2 marks): Figure 4 shows two amines, P and Q. Figure 4 Explain why P is a stronger base than Q. [2 marks]
- June 2023, Paper 3, Q34 (1 mark): Which compound is the strongest base? [1 mark] A B C NH3 D NH4Cl
- June 2022, Paper 2, Q10.5 (2 marks): Explain why amine B is a stronger base than amine A. [2 marks]
- November 2021, Paper 2, Q02.4 (4 marks): Compound Z (HOCH2CH2NH2) can be used to remove carbon dioxide from the mixture of waste gases produced in some power stations. Figure 1 shows part of a suggeste
- June 2019, Paper 2, Q01.4 (2 marks): Explain why 3-aminopentane is a stronger base than ammonia. [2 marks]
- June 2018, Paper 2, Q10.5 (2 marks): A student dissolves a few drops of propylamine in 1 cm3 of water in a test tube. Give an equation for the reaction that occurs. Describe what is observed when U
- June 2018, Paper 3, Q24 (1 mark): Aqueous solutions of ammonia, ethylamine and phenylamine are prepared. Each solution has the same concentration. Which is the correct order for the pH values of
- June 2017, Paper 2, Q11.1 (6 marks): Amines E, F and G are weak bases. Explain the difference in base strength of the three amines and give the order of increasing base strength. [6 marks
- June 2016, CHEM4 (old spec), Q3(f)(i) (3 marks): Suggest which one of the nitrogen atoms labelled a or b is protonated in lidocaine hydrochloride. Explain your answer. [3 marks] Nitrogen atom protonated Explan
- June 2016, CHEM4 (old spec), Q3(f)(ii) (2 marks): Suggest why lidocaine hydrochloride is used medically in preference to lidocaine. Explain your answer. [2 marks]
- June 2015, CHEM4 (old spec), Q5(d) (3 marks): Compound K (C6H5CH2NH2) is a structural isomer of J. Explain why J is a weaker base than K. [3 marks]
- June 2013, CHEM4 (old spec), Q9(a) (3 marks): The medicine is usually supplied as a salt. The salt is formed when one mole of imipramine reacts with one mole of hydrochloric acid. Suggest why the nitrogen a
- January 2012, CHEM4 (old spec), Q3(b)(i) (1 mark): Write an equation for the reaction of ethylamine (CH3CH2NH2) with water to form a weakly alkaline solution. (1 mark)
- January 2012, CHEM4 (old spec), Q3(c) (3 marks): State which is the stronger base, ammonia or ethylamine. Explain your answer. Stronger base Explanation
- June 2011, CHEM4 (old spec), Q8(d) (3 marks): Explain why amine U is a weaker base than amine W.
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