Metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :

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General Principles and processes of Isolation of Elements

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The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :

A

$Ag$

B

$Ca$

C

$Cu$

D

$Cr$

(JEE MAIN-2014)

Solution

On electrolysis of aqueous solution of s-block elements $H_{2}$ gas discharge at cathode.

At cathode $H_{2} O+e^{-} \rightarrow \frac{1}{2} H_{2}+O H^{-}$

Standard 12

Chemistry

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