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Out of the following matals that cannot ...

Out of the following matals that cannot be obtained by electrolysis of the aquenous solution of their salts is

A

Ag

B

Mg

C

Cu

D

Al

Text Solution

Verified by Experts

The correct Answer is:
B, D
Magnesium and aluminium lie above hydrogen in electrochemical series. Their standard reduction potentials are lower than that of hydrogen. When their salts are electrolysed in aqueous solutions, hydrogen gas is liberated at the cathode.
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