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When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are

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Impure sample Pure copper

Pure copper Impure sample

Impure zinc Impure sample

Cathode Anode

Pure zinc Pure copper

answer is C.

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Detailed Solution

Impure metal made anode while pure metal made cathode.

Impure Cu will oxidise from anode along with Zn but only ${Cu}^{+ 2}$ will reduce on cathode in purification of copper with zinc impurity.

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