O-LevelChemistryElectrolysis5070/12 · Oct/Nov 2023 · Q121 Mark

Aqueous copper(II) sulfate is electrolysed using copper electrodes. Which row correctly describes what happens?

Aincreases, decreases, remains blue

Bremains the same, decreases, becomes colourless

Cdecreases, increases, remains blue

Dremains the same, increases, becomes colourless

✓ Correct answer

C: decreases, increases, remains blue

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2023 Paper 1 Variant 2, question 12.

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