0654.C6.3.01 — Define redox reactions as involving simultaneous oxidation and reduction: past paper questions
Real questions on 0654.c6.3.01 — define redox reactions as involving simultaneous oxidation and reduction
The newest 13 of 13 written questions. Open one to see it on the real paper.
- 0973/31 · October/November 2025 · Q7a(i)[2]
Explain why this reaction shows both oxidation and reduction.
See it on the paper → - 0973/41 · October/November 2024 · Q11b[1]
At the anode oxide ions, O 2– , form oxygen molecules. 2O 2– O 2 + 4e – State if this reaction is oxidation or reduction. Explain your answer.
See it on the paper → - 0973/41 · May/June 2024 · Q2b(iii)[2]
The ionic equation for this reaction is shown. Mg + 2H + Mg 2+ + H 2 Explain why this reaction is described as a redox reaction.
See it on the paper → - 0973/41 · May/June 2024 · Q8c(i)[2]
Construct the balanced symbol equation for this reaction.
See it on the paper → - 0973/41 · May/June 2024 · Q8c(ii)[1]
State the name of this type of reaction. Choose from the list. addition displacement neutralisation thermal decomposition
See it on the paper → - 0973/42 · May/June 2023 · Q11d(i)[1]
The ionic half‑equation for the formation of oxygen gas at the anode is shown. 4OH – 2H 2 O + O 2 + 4e – State if this reaction is oxidation or reduction. Explain your answer using ideas about electrons.
See it on the paper → - 0973/31 · May/June 2022 · Q5c(iii)[1]
Aluminium cannot be extracted from its ore by heating with carbon. Name one metal which can be extracted from its ore by heating with carbon.
See it on the paper → - 0973/41 · May/June 2021 · Q8c(i)[1]
State, in terms of electrons, if this reaction is oxidation or reduction. Explain your answer. statement explanation
See it on the paper → - 0973/42 · May/June 2021 · Q8b[1]
The student does the experiment again. He makes only one change. He uses dilute hydrochloric acid at a temperature of 35 °C instead of 25 °C. Sketch a line on Fig. 8.2 to predict the results at 35 °C.
See it on the paper → - 0973/42 · May/June 2021 · Q8c[2]
The student’s results show that it takes less time for indigestion tablets to react when the acid is more concentrated. Explain why reactions are faster when reactants are more concentrated. Explain your answer in terms of collisions between particles.
See it on the paper → - 0973/41 · May/June 2020 · Q5b(i)[1]
State if this reaction is oxidation or reduction. Explain your answer.
See it on the paper → - 0973/41 · October/November 2019 · Q8b(i)[1]
In a catalytic converter carbon monoxide is oxidised. State the product of this oxidation.
See it on the paper → - 0973/31 · May/June 2019 · Q8c(ii)[2]
Identify the type of chemical reaction that occurs between carbon and copper oxide. Explain your answer. type of reaction explanation
See it on the paper →
What examiners said
This question was very well answered with many candidates linking oxidation to the loss of electrons.
— Examiner report, May/June 2023, 0973/42 Q11(d)(i) (Cambridge)
Iron and copper were popular correct answers to this question.
— Examiner report, May/June 2022, 0973/31 Q5(c)(iii) (Cambridge)
Those who stated that the discharge of bromide ions is oxidation usually explained that electrons are lost.
— Examiner report, May/June 2021, 0973/41 Q8(c)(i) (Cambridge)
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