1.

State the observations at the anode and at the cathode during the electrolysis of:(i) fused lead bromide using graphite electrodes. (ii) copper sulphate solution using copper electrodes.

Answer»

(i) At anode : Dark reddish brown fumes of bromine evolve at the anode. 

At cathode: Greyish white metal lead is formed on the cathode. 

(ii) At anode: Anode decreases in size due to the formation of copper ions.

At cathode: Reddish brown copper is deposited



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