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JEE Main levelOne or more correct optionsDifficulty 2 of 3mt143

For the electrolytic refining of copper with acidified $CuSO X_{4}$ electrolyte, select the correct statements.

Athe impure copper plate is the anode
Bzinc and iron impurities deposit on the cathode together with copper
Csilver and gold collect below the anode as mud
Da thin sheet of pure copper is used as the cathode

Answer: A, C, D

Impure copper is the anode, pure copper the cathode and noble-metal impurities fall as anode mud. Zn and Fe are more electropositive than Cu, so they stay in solution as

Zn X^{2 +}

and

Fe X^{2 +}

and do not deposit.

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