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The passage of current through a solutio...

The passage of current through a solution of certain electrolyte results in the evolution of `H_2`(g) at cathode and `Cl_2`(g) at anode. The electrolytic solution is :

A

copper chloride in water

B

aq.NaCl

C

`H_2SO_4`

D

Water

Text Solution

Verified by Experts

The correct Answer is:
B
Since discharge potential of watier is greater than that of sodium so water is reduced at cathode instead of `Na^(+)`.
Cathode: `H_(2)O+e^(-)to(1)/(2)H_(2)+OH^(-)`
Anode: `Cl^(-)to(1)/(2)Cl_(2)+e^(-)`.
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