Question

Match the following:

List-I

A) Electrolysis of aq. sol. of $N{a}_{2}S{O}_4$ by using inert electrodes.

B) Electrolysis of 50% $H_{2}S{O}_4$ using Pt electrodes.

C) Electrolysis of Aq. sol. of $AgN{O}_3$ using inert electrodes.

D) Electrolysis of aq. $AgN{O}_3$ using silver electrodes.

List-II

1) Ag at cathode $O_2$ at anode

2) $H_2$at cathode $O_2$ at anode

3) $H_2$ at cathode $H_2{S}_2{O}_8$ at anode

4)$A{g}^{+}+e^{-}\to Ag$
$Ag\to A{g}^{+}+e^{-}$

• A. A-2, B-3, C-1, D-4
• B. A-4, B-3, C-2, D-1
• C. A-3, B-2, C-4, D-1
• D. A-1, B-3, C-4, D-2

Answer 1

The correct option is A A-2, B-3, C-1, D-4

During electrolysis of dilute aqueous sodium sulphate solution with inert electrodes, water dissociates to form hydrogen and oxygen. Hydrogen is evolved at cathode and oxygen is evolved at anode.
During electrolysis of 50 % sulfuric acid solution using platinum electrodes, hydrogen is evolved at cathode and $H_2{S}_2{O}_8$ is formed at anode.
During electrolysis of aqueous silver nitrate using inert electrodes, at anode, oxygen is evolved from water and at cathode, silver is deposited.
During electrolysis of aqueous silver nitrate using silver electrodes, at anode silver metal is oxidized to silver ions, and at cathode, silver ions are reduced to silver metal.