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Question

The electrolyte used for copper refining is an acidic solution of:

A
copper chloride
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B
copper sulphide
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C
copper sulphate
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D
impure copper
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Solution

The correct option is C copper sulphate
The purest copper is obtained by an electrolytic process, undertaken using a slab of impure copper as the anode and a thin sheet of pure copper as the cathode. The electrolyte is an acidic solution of copper sulphate.

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