O-LevelChemistryElectrolysis5070/11 · May/June 2014 · Q221 Mark

In the extraction of aluminium by electrolysis, its oxide is dissolved in molten cryolite. Cryolite is a sodium salt. Aluminium is deposited at the ......1...... and it can be deduced that aluminium is ......2...... sodium in the reactivity series. Which words correctly complete gaps 1 and 2?

A1: +ve electrode, 2: above

B1: +ve electrode, 2: below

C1: -ve electrode, 2: above

D1: -ve electrode, 2: below

✓ Correct answer

D: 1: -ve electrode, 2: below

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2014 Paper 1 Variant 1, question 22.

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