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

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

Electrochemistry

Solution:

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