In electrorefining of copper, gold is deposited at :

Cathode

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Anode mud

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Cathode mud

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None of these

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Solution

The correct option is B Anode mud
During electrolysis impurities like gold is deposited at anode as anode mud and pure copper is deposited at the cathode. In copper refining gold is an impurity.

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In electrorefining of copper, impure copper is made anode.

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