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Q.

H2 gas is liberated at cathode and anode both by electrolysis of the following aqueous solution except in

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a

NaH

b

HCOONa

c

NaCl

d

LiH

answer is C.

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Detailed Solution

In case of NaCl
At anode:
2Cl−→Cl2​+2e−
At cathode:
2H++2e−→H2​
So here, Cl2​ liberated at anode.
In other cases, hydrides liberate hydrogen gas at anode and hydrogen ion liberates hydrogen gas at cathode.

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