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Extraction of Aluminium

During the el...

Question

During the electrolytic reduction of alumina, which of the following element is deposited at the cathode?

A

Oxygen

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B

Graphite

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C

Carbon dioxide

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D

Aluminium

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Solution

The correct option is D
Aluminium

Aluminium is produced by the electrolytic reduction of fused alumina $(A l_{2} O_{3})$ in the electrolytic cell. Aluminium is deposited at the cathode and oxygen gas is liberated at the anode. Oxygen combines with graphite to form $C O_{2}$ .

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