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When sodium chloride solution is elect...

When sodium chloride solution is electrolysed , the gas that is liberated at the cathode is ________.

A

oxygen

B

hydrogen

C

chlorine

D

gas

Text Solution

Verified by Experts

The correct Answer is:
B

At cathode, `Na^+` ion will not be reduced because its reduction potential is very low(-2.71 V).`H^+` ions will not be reduced due to its very low concentration. Hence, H20 will be reduced at cathode.
`2H_2O + 2e^(-) to H_2 uarr + 2OH^-`
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