(a) State whether the following statements are true or false. Justify your answer.

(1) Electrolysis of molten lead bromide is considered to be a redox reaction.

(2) Copper is a good conductor of electricity but it is a non-electrolyte.

(b) State the reaction occurring at the anode during electrolysis of copper sulphate solution using a copper anode and platinum anode respectively.

(a) (i) True

Electrolysis of molten lead bromide involves oxidation and reduction reactions and hence is a redox reaction.

Dissociation of lead bromide

PbBr₂ ⇌ Pb²⁺ + 2Br^1-

Reduction reaction at cathode:
Pb²⁺ + 2e^- ⟶ Pb

Oxidation reaction at the anode:
Br^1- - 1e^- ⟶ Br
Br + Br ⟶ Br₂

(a) (ii) True

Copper does not undergo chemical decomposition due to flow of electric current through it. Hence, copper is a good conductor of electricity but it is a non-electrolyte.

(b) Reaction at anode [active copper] : Cu - 2e^- ⟶ Cu²⁺

Reaction at anode [inert platinum] : OH^1- - 1e^- ⟶ OH x 4

4OH ⟶ 2H₂O + O₂