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Chemistry · May / June 2020 · Paper 11 · Question 30

5070Electrolysis

In the electrolysis of molten aluminium oxide, which statement is correct?

  1. AThe molar ratio of aluminium to oxygen gas formed is 1 : 2.
  2. BThe molar ratio of aluminium to oxygen gas formed is 3 : 4.
  3. COxygen gas is formed at the anode.
  4. DReduction occurs at the anode.

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Correct answer: C. Oxygen gas is formed at the anode.

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