How is aluminium extracted from its ore?
Answer and explanation
Correct answer: A. By electrolysis of molten aluminium oxide
- Step 1: Aluminium is a reactive metal.
- Step 2: Its oxide cannot be reduced by carbon, so it is split by electrolysis.
Answer
By electrolysis of molten aluminium oxide.
Why not the others: By heating the ore with carbon: aluminium is above carbon in the reactivity series. By heating the ore alone: this does not remove the oxygen. By adding water to the ore: this does not extract the metal.
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