In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of:

platinum

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carbon

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pure aluminium

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copper

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Solution

The correct option is C carbon

The hall-heroult process is used for smelting of aluminium.
In the Hall-Heroult process, the cathode is made of carbon. Also, here anode is also made up of carbon.

Hence, the correct option is $B$

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Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:

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