The newest 9 of 8 written questions. Open one to see it on the real paper.
State the meaning of oxidation. (i)
See it on the paper →Which reactions involve oxidation?
See it on the paper →Oxygen gas is also made during the electrolysis of water. 4OH – 2H 2 O + O 2 + 4e – This is an example of oxidation. Explain why.
See it on the paper →Methane is oxidised in this reaction. Explain how the symbol equation shows that methane is oxidised.
See it on the paper →Oxide ions lose electrons to form oxygen molecules. The ionic half-equation for the reaction is: 2O 2– – 4e – O 2 Electrons are lost during this process. State the name of this type of reaction.
See it on the paper →State the substance that is oxidised in this reaction.
See it on the paper →State which equation A, B, C or D represents only oxidation.
See it on the paper →Copper is extracted from copper oxide by heating copper oxide with carbon. 2CuO + C 2Cu + CO 2 CuO acts as an oxidising agent in this reaction. Define the term oxidising agent.
See it on the paper →Many candidates were able to show an understanding of oxidation.
— Examiner report, February/March 2024, 0654/32 Q8(b)(ii) (Cambridge)
The discharge of oxide ions was often correctly named oxidation.
— Examiner report, October/November 2022, 0654/41 Q11(d)(ii) (Cambridge)
(i)(ii)(iii) Many candidates identified all three equations correctly.
— Examiner report, October/November 2020, 0654/43 Q11(a) (Cambridge)
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Which statement explains why the rusting of iron is an oxidation reaction?
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