State your observation: At the cathode when acidified aq. CuSO₄ soln. is electrolysed with copper electrodes.

During electroplating an article with silver, the electrolyte used is:

1. silver nitrate solution
2. silver cyanide solution
3. sodium argentocyanide solution
4. nickel sulphate solution

State which electrode: anode or cathode is the oxidizing electrode. Give a reason for the same.

The observation seen when fused lead bromide is electrolysed is:

1. a silver grey deposit at anode and a reddish brown deposit at cathode.
2. a silver grey deposit at cathode and a reddish brown deposit at anode.
3. a silver grey deposit at cathode and reddish brown fumes at anode.
4. silver grey fumes at anode and reddish brown fumes at cathode.