0653.C6.3.01 — Define redox reactions as involving simultaneous oxidation and reduction: past paper questions
Real questions on 0653.c6.3.01 — define redox reactions as involving simultaneous oxidation and reduction
The newest 10 of 10 written questions. Open one to see it on the real paper.
- 0653/01 · Specimen 2025 · Q17[1]
Which equation shows a reduction of the underlined substance?
See it on the paper → - 0653/33 · October/November 2025 · Q4a(iii)[4]
Complete the sentences about the reaction of magnesium with steam. Use words from the list. Each word may be used once, more than once or not at all. anions cations neutrons neutralisation covalent electrons oxidation protons ionic reduction During the reaction, magnesium atoms lose to form positive ions. These positiv...
See it on the paper → - 0653/32 · May/June 2025 · Q5d[1]
Iron is extracted from iron( III ) oxide in a blast furnace. Fe 2 O 3 + 3CO 2Fe + 3CO 2 Circle the type of reaction when iron( III ) oxide forms iron.
See it on the paper → - 0653/32 · February/March 2024 · Q2c(ii)[1]
Circle the word that describes the reaction between lithium and oxygen. decomposition distillation neutralisation oxidation
See it on the paper → - 0653/12 · October/November 2023 · Q17[1]
Which chemical terms describe this reaction?
See it on the paper → - 0653/31 · October/November 2023 · Q5d[1]
Aluminium reacts with iron( III ) oxide, Fe 2 O 3 , at high temperatures. The equation for this reaction is shown. 2Al + Fe 2 O 3 Al 2 O 3 + 2Fe Identify one substance that is oxidised and one substance that is reduced during this reaction. oxidised reduced
See it on the paper → - 0653/33 · May/June 2023 · Q2c(i)[1]
Explain why this combustion reaction is a redox reaction.
See it on the paper → - 0653/32 · February/March 2023 · Q5c(i)[1]
State the meaning of the term oxidised.
See it on the paper → - 0653/12 · October/November 2022 · Q19[1]
Which statement about this reaction is not correct?
See it on the paper → - 0653/33 · October/November 2022 · Q5b(i)[1]
Explain why the combustion of magnesium is described as oxidation.
See it on the paper →
What examiners said
The removal of oxygen from a compound is reduction, and some candidates answered this correctly. There was no pattern to the answers chosen by the remaining candidates.
— Examiner report, May/June 2025, 0653/32 Q5(d) (Cambridge)
Candidates chose the incorrect option C more often than the correct option, B. Candidates should know that sodium carbonate, a base, is neutralised by acids, and that this reaction is exothermic. They should also know that thermal decomposition reactions only occur with the application of large amounts of thermal energy.
— Examiner report, October/November 2023, 0653/12 Q17 (Cambridge)
Candidates found this question demanding. Many candidates successfully identified aluminium as the substance being oxidised, but by far the most common response for the substance that is being reduced was iron. Since both correct answers were needed for this question, few candidates scored the mark. In terms of oxygen gained or lost, the aluminium gains oxygen and is therefore oxidised. The Fe2O3...
— Examiner report, October/November 2023, 0653/31 Q5(d) (Cambridge)
Past papers, syllabus and examiner reports © UCLES (Cambridge University Press & Assessment). Questions are matched to topics from the official syllabus. AssessPro is independent and not endorsed by Cambridge.