The diagram shows the sketch of an electrolytic cell used in the extraction of aluminium. What is the substance of which the electrodes A and B are made?

Carbon and graphite

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Zinc and copper

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Copper and iron

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None of the above

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Solution

The correct option is A Carbon and graphite
The diagram shows an aluminium oxide electrolysis cell. Both the negative electrode (cathode) and the positive electrode (anode) are made of graphite, which is a form of carbon.

Hence, option A is correct.

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