A-LevelChemistryElectrochemistry9701/12 · Oct/Nov 2012 · Q71 Mark

Aluminium is extracted by the electrolysis of a molten mixture containing aluminium oxide. By a similar method, magnesium is extracted by the electrolysis of a molten mixture containing magnesium chloride. Which statement about the extraction of magnesium is correct?

AMagnesium ions travel to the anode and are oxidised to magnesium metal.

BMagnesium ions travel to the anode and are reduced to magnesium metal.

CMagnesium ions travel to the cathode and are oxidised to magnesium metal.

DMagnesium ions travel to the cathode and are reduced to magnesium metal.

✓ Correct answer

D: Magnesium ions travel to the cathode and are reduced to magnesium metal.

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2012 Paper 1 Variant 2, question 7.

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