Give appropriate scientific reasons for the following statements :
Electrolysis of molten lead bromide is considered to be a redox reaction.

Explanation

During electrolysis, molten lead bromide decomposes to Pb2+ which moves towards cathode gaining two electrons i.e., reduced and Br moves towards anode loosing two elecrons to form bromine gas i.e., oxidised. Thus it is a redox reaction.
`Pb Br _(2) to Pb + Br _(2)`
At cathode:` Pb ^(2+) + 2 e ^(-) to Pb`
At anode: `2Be ^(-) to Br _(2) + 2e ^(-)`