O-LevelChemistryElectrolysis5070/11 · Oct/Nov 2014 · Q121 Mark

Which changes are observed during the electrolysis of aqueous copper(II) sulfate using copper electrodes? 1 A pink solid is deposited on the negative electrode. 2 Bubbles form on the positive electrode. 3 The colour of the solution does not change.

A1 and 2 only

B1 and 3 only

C2 and 3 only

D1, 2 and 3

✓ Correct answer

B: 1 and 3 only

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2014 Paper 1 Variant 1, question 12.

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