Question

The gas evolved at anode during the electrolysis of brine is

• A. $C{l}_2$
• B. $H_2$
• C. $O_2$
• D. HCl

Answer 1

The correct option is A $C{l}_2$

During the electrolysis of aqueous sodium chloride solution (brine), the following reaction takes place:

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

Chlorine gas is evolved at the anode and hydrogen gas at the cathode. Sodium hydroxide solution is formed near the cathode.

Hence, the correct answer is option (a).