Give reason for the following : Electrolysis of molten lead bromide is considered a redox reaction.

Electrolysis of molten lead bromide involves oxidation and reduction reaction and hence is a redox reaction. The reactions are as follows :

Reaction at the cathode:
Pb²⁺ + 2e^– ⟶ Pb [Reduction reaction]

Reaction at anode:
Br^1- – 1e^– ⟶ Br
Br + Br ⟶ Br₂ [Oxidation reaction]