O-LevelChemistryElectrolysis5070/12 · May/June 2015 · Q291 Mark

Aluminium is produced by the electrolysis of molten aluminium oxide. Which statement about the process is correct?

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AAluminium ions are reduced to aluminium by gaining electrons.

BAluminium oxide is reduced by cryolite.

CAluminium oxide is reduced by the carbon electrodes.

DAluminium oxide is reduced by the carbon monoxide formed at the negative electrode.

✓ Correct answer

A: Aluminium ions are reduced to aluminium by gaining electrons.

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2015 Paper 1 Variant 2, question 29.

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