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Question Question 2(2017)
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.