Which metal is extracted from its ore by electrolysis?
Answer and explanation
Correct answer: A. Aluminium
Aluminium is too reactive to be reduced by carbon, so its molten oxide is electrolysed.
Answer: Aluminium.
Why not the others: Iron: it is reduced with carbon in a blast furnace. Copper: it can be reduced by heating with carbon. Zinc: it can be reduced with carbon.
Answer: Aluminium.
Why not the others: Iron: it is reduced with carbon in a blast furnace. Copper: it can be reduced by heating with carbon. Zinc: it can be reduced with carbon.
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