O-LevelChemistryElectrolysis5070/12 · May/June 2018 · Q311 Mark

The diagram shows a cell that can be used to extract a metal from its oxide. Molten aluminium oxide, copper(II) oxide, lead(II) oxide and magnesium oxide are each electrolysed in separate cells. Each cell receives the same number of electrons. Which statement is correct?

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AAll the metals can also be extracted from their oxides using coke.

BThe anode and cathode should be made of the metal being extracted.

CThe pure metal is always produced at the cathode.

DThe same mass of each metal is formed.

✓ Correct answer

C: The pure metal is always produced at the cathode.

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2018 Paper 1 Variant 2, question 31.

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