O-LevelChemistryElectrolysis5070/11 · May/June 2021 · Q331 Mark
Which reactions take place during the extraction of aluminium from aluminium oxide using carbon electrodes? 1 2O²⁻ → O₂ + 4e⁻ 2 C + O₂ → CO₂ 3 Al²⁺ + 2e⁻ → Al
A1 only
B1 and 2 only
C2 and 3 only
D1, 2 and 3
✓ Correct answer
B: 1 and 2 only
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