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.

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

The ion which is discharged at the anode during the electrolysis of copper sulphate solution using platinum electrodes as anode and cathode is:

1. Cu²⁺

2. OH^-

3. SO₄^2-

4. H⁺

When dilute sodium chloride is electrolysed using graphite electrodes, the cation which is discharged at the cathode most readily :

1. Na⁺

2. OH^-

3. H⁺

4. Cl^-