JEE Main Chemistry question

Out of the following metals that cannot be obtained by electrolysis of the aqueous solution of its salts is

(A)Ag
(B)Cr
(C)Cu
(D)MgCorrect

Answer: (D)

Solution

Ag, Cr and Cu (A, B, C) are all commonly electrodeposited from aqueous solutions of their salts (electroplating/electrorefining), since their reduction potentials allow them to be discharged at the cathode before water is reduced. Magnesium, being a much more

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Question ID VK-137664