A-LevelChemistryElectrochemistry9701/12 · Oct/Nov 2020 · Q91 Mark

Chlorine dioxide, ClO₂, reacts with sodium hydroxide in the reaction shown. 2ClO₂ + 2OH¯ → ClO₂⁻ + ClO₃⁻ + H₂O Which statement correctly describes this redox reaction?

AChlorine atoms are oxidised and oxygen atoms are reduced.

BChlorine atoms are reduced and oxygen atoms are oxidised.

CSome chlorine atoms are oxidised and some chlorine atoms are reduced.

DSome oxygen atoms are oxidised and some oxygen atoms are reduced.

✓ Correct answer

C: Some chlorine atoms are oxidised and some chlorine atoms are reduced.

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 2, question 9.

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