Question

Choose the correct option regarding chlor-alkali reaction:

• A. $O_2$ is given off at anode
• B. ${\text{Cl}}_2$ is given off at cathode
• C. ${\text{H}}_2$ is given off at anode
• D. ${\text{H}}_2$ is given off at cathode

Answer 1

The correct option is D

${\text{H}}_2$ is given off at cathode

Brine solution (aqueous $\text{NaCl}$) decomposes on application of electricity.

$NaCl+H_{2}O\to NaOH+C{l}_2+H_2$

Chlorine gas is given off at anode and hydrogen gas is given off at cathode.