Which of the following is a weak electrolyte?

A compound which liberates reddish brown gas around the anode during electrolysis in its molten state is:

Electrolyte used for electroplating with nickel is

Cations are formed by

The anode used in the extraction of aluminium is

Identify the solution that would cause the bulb to glow brightly when used as the electrolyte in the diagram.
                

During electroplating nickel gets deposited at

Water consists almost entirely of

Electrolyte used for electroplating with silver is

Which of the following pairs of metals are extracted only by electrolysis?