Question

What will happen to $pH$ of brine solution if electrolysed?

• A. $pH$ will decrease
• B. $pH$ will increase
• C. $pH$ remains the same
• D. $pH=7$

Answer 1

Answer: (B)

$H_2$ is liberated at cathode and $C{l}_2$ at anode during the electrolysis of $NaCl$ solution. $NaOH$ is formed so $pH$ will rise.