O-LevelChemistryElectrolysis5070/11 · Oct/Nov 2017 · Q151 Mark

When aqueous copper(II) sulfate is electrolysed using copper electrodes, which observations are correct?

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Aelectrode becomes smaller, electrode becomes bigger, constant

Belectrode becomes smaller, gas given off, fades

Cgas given off, electrode becomes bigger, fades

Dgas given off, gas given off, constant

✓ Correct answer

A: electrode becomes smaller, electrode becomes bigger, constant

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 1, question 15.

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