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O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2024 · Q211 Mark

Many reactions involve oxidation and reduction. Which statement is correct?

AAcidified manganate(VII) ions change colour from colourless to purple when reduced.
BAll reactions that involve oxidation also involve reduction.
CDuring a reaction, oxidising agents lose electrons.
DReduction is the loss of hydrogen from a compound.

✓ Correct answer

B: All reactions that involve oxidation also involve reduction.

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About this question

Topic
Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, May/June 2024 Paper 1 Variant 1, question 21.

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