Question 37

Which one of the following statements is correct for electrolysis of brine solution?

Name: Which one of the following statements is correct for electrolysis of brine solution?
Uploaded: 2026-06-30T09:55:11.795153+05:30
Duration: 1 min 46 s
Description: Which one of the following statements is correct for electrolysis of brine solution?

Solution

During electrolysis of brine (concentrated NaCl solution):

At the anode (oxidation):

$$ 2Cl^- \rightarrow Cl_2 + 2e^- $$

Chlorine gas is liberated at the anode.

At the cathode (reduction):

$$ 2H_2O + 2e^- \rightarrow H_2 + 2OH^- $$

Hydrogen gas is liberated and hydroxide ions ($$OH^-$$) are formed at the cathode.

Therefore, $$OH^-$$ is formed at the cathode.

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