O-LevelChemistryElectrolysis5070/12 · May/June 2022 · Q241 Mark

An excess of aqueous iodide ions is added to acidified aqueous potassium manganate(VII). Which row is correct?

Aoxidised (iodide ions), colourless (colour of final solution)

Boxidised (iodide ions), brown (colour of final solution)

Creduced (iodide ions), colourless (colour of final solution)

Dreduced (iodide ions), brown (colour of final solution)

✓ Correct answer

B: oxidised (iodide ions), brown (colour of final solution)

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2022 Paper 1 Variant 2, question 24.

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