JEE Main Chemistry question

Of the following, which cannot be obtained by electrolysis of the aqueous solution of their salts?

(A)Cu
(B)Ag
(C)Mg and AlCorrect
(D)Cr

Answer: (C)

Solution

Mg and Al are so strongly electropositive that in aqueous solution, water is preferentially reduced at the cathode (liberating H) rather than the metal ion, so they cannot be deposited by aqueous

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Question ID VK-145243