Question

A solution of sodium sulphate in water is electrolyzed using inert electrodes. The products at cathode and anode are, respectively,

• A. $H_2,O_2$
• B. $O_2,H_2$
• C. $O_2,Na$
• D. $O_2,S{O}_2$

Answer 1

The correct option is A

$H_2,O_2$

$N{a}^{+}$ ions are not reduced at cathode and $S{O}_4^{2-}$ ions are not oxidized at anode.

However, it is easier for ions of water i.e. $H^{+}$ and $O{H}^{-}$ to undergo reduction and oxidation, respectively. Hence, the products obtained are $H_2$ and $O_2$.