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Question

In the electrolytic refining process of zinc, it is given that the crude metal is made anode while the electrolyte is used is H2SO4 (dilute) + ZnSO4. The cathode should be:


A

Pure Zinc

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B

Zn-Hg Amalgam

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C

Aluminum

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D

All of the above

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Solution

The correct option is C

Aluminum


For the given electrolyte, Pure Zinc cathode gets dissolved in dilute H2SO4 and thus is impractical. Hence Aluminium is used as the cathode.


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