JEE Advanced 2015 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Advanced 2015

Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process is (are)

(A)Impure Cu strip is used as cathode
(B)Acidified aqueous is used as electrolyteCorrect
(C)Pure Cu deposits at cathodeCorrect
(D)Impurities settle as anode-mudCorrect

Answer: (B),(C),(D)

Solution

In electrolytic refining the impure (blister) copper is made the anode and a thin strip of pure copper the cathode, so (A) is wrong. The electrolyte is an acidified aqueous solution (B). At the anode

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Question ID VK-026398