O-LevelChemistryElectrolysis5070/11 · Oct/Nov 2012 · Q131 Mark

In the experiment shown in the diagram, the bulb lights and a gas is produced at each electrode. What is X?

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Aaqueous copper(II) sulfate

Bconcentrated aqueous sodium chloride

Cethanol

Dmolten lead bromide

✓ Correct answer

B: concentrated aqueous sodium chloride

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2012 Paper 1 Variant 1, question 13.

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