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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

Cu

B

Ag

C

Mg

D

Au

Text Solution

Verified by Experts

The correct Answer is:
C
Na, K and Mg are placed above hydrogen in the electrochemical series. When the aqueous solution of these salts are electrolysed, hydrogen is released at the cathode instead of the respective metals. Cu is placed below hydrogen in the electrochemical series, when aqueous solution of copper is electrolysed, copper is deposited at the cathode.
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