O-LevelChemistryElectrolysis5070/12 · May/June 2016 · Q121 Mark

Copper is purified by electrolysis. Which statement is not correct?

ABoth electrodes contain copper.

BCopper is both oxidised and reduced in the process.

CPure copper is deposited on the positive electrode.

DThe electrolyte is aqueous copper(II) sulfate.

✓ Correct answer

C: Pure copper is deposited on the positive electrode.

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2016 Paper 1 Variant 2, question 12.

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