State the observations at the anode & at the cathode during the electrolysis of –
(i) Fused lead bromide using graphite electrodes.
(ii) Copper sulphate solution using copper electrodes.

(i) The observations at the anode & at the cathode are:
At cathode — silvery grey deposit of lead metal.
At anode — reddish brown fumes of bromine vapours.

(ii) The observations at the anode & at the cathode are:
At cathode — Brownish pink copper metal is deposited at cathode during electrolysis of copper sulphate.
At anode — Copper ions are formed. Copper anode diminishes in mass.

Blue colour of CuSO₄ remains unchanged.