Question

In electro-refining of metal the impure metal is used to make the anode and a strip of pure metal as the cathode, during the electrolysis of an aqueous solution of a complex metal salt. This method cannot be used for refining of
(a) Silver
(b) Copper
(c) Aluminium
(d) Sodium

Answer 1

option d is correct

Answer 2

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➡️Correct Option -: D✔️✔️

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