During electrolysis of fused sodium chloride the gas formed at the anode is:

State one observation for the following:

Copper sulphate solution is electrolysed using copper electrodes.

State one relevant reason for the following:

• Graphite anode is preferred to platinum in the electrolysis of molten lead bromide.

Name the gas that is produced in the following case:

At the anode during the electrolysis of acidified water.

State one relevant observation for of the following:

At the anode, when molten lead bromide is electrolyzed using graphite electrodes.

Will the bulb in the following circuits glow? Justify your answer.

Will the bulb in the following circuits glow? Justify your answer.

What do you understand by a closed electric circuit?

Figures below show a cell connected to a bulb through insulated copper wires. State with the reason in which case will the bulb (i) glow, and (ii) not glow.