In electrorefining of copper, some gold is deposited as:

Anode mud

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Cathode mud

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Flux

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Slag

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Solution

The correct option is C Anode mud
In electrorefining step, impurities like Fe, Ni, Zn get dissolved in the solution while Au, Ag and Pt are deposited as anode mud below the anode.

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C u

In electrorefining of copper, impure copper is made anode.

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