0653.C7.1.04 — Describe the characteristic properties of bases in terms of their reactions with acids: past paper questions
Real questions on 0653.c7.1.04 — describe the characteristic properties of bases in terms of their reactions with acids
The newest 6 of 6 written questions. Open one to see it on the real paper.
- 0653/42 · October/November 2025 · Q4a(iii)[2]
Tick (✓) all the statements that are true for aqueous sodium hydroxide. It is a covalent substance. It turns universal indicator purple. It reacts with dilute sulfuric acid to form sodium sulfate.
See it on the paper → - 0653/62 · February/March 2022 · Q2b(i)[1]
Tick (3) the box that shows the name of the gas made. ammonia carbon dioxide hydrogen oxygen
See it on the paper → - 0653/62 · February/March 2022 · Q2b(ii)[1]
Name the positive ion (cation) present in solid H.
See it on the paper → - 0653/62 · February/March 2022 · Q2b(iii)[1]
Describe one safety precaution the student takes when heating the test-tube. Explain your answer. safety precaution explanation
See it on the paper → - 0653/62 · February/March 2022 · Q2c(i)[1]
Predict one observation the student makes about this reaction.
See it on the paper → - 0653/62 · February/March 2022 · Q2c(ii)[1]
Tick (3) the box that names the negative ion (anion) present in solid H. carbonate chloride nitrate sulfate
See it on the paper →
What examiners said
The test for ammonia was well known. All responses were seen with carbon dioxide being the most common.
— Examiner report, February/March 2022, 0653/62 Q2(b)(i) (Cambridge)
Candidates found this very challenging. Common incorrect responses included ammonia, sodium, calcium, copper and hydrogen.
— Examiner report, February/March 2022, 0653/62 Q2(b)(ii) (Cambridge)
Whilst many candidates recognised a suitable safety precaution, far fewer explained in sufficient detail why the precaution should be taken. What the precaution is protecting and what it is being protected from should both be included in the answer.
— Examiner report, February/March 2022, 0653/62 Q2(b)(iii) (Cambridge)
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