On the electrolysis of aqueous solution of sodium sulphate,at the cathode we get:

Which of the following statements is correct regarding the electrolysis of molten $NaCl$?

In the industrial production of which of the following,molecular hydrogen is obtained as a byproduct?

Electrolysis of molten anhydrous calcium chloride produces

The platinum electrodes were immersed in a solution of cupric sulphate and electric current was passed through the solution. After some time,it was found that the colour of copper sulphate disappeared with the evolution of gas at the electrode. The colourless solution contains:

When an aqueous solution of cupric bromide is electrolyzed,the product obtained at the cathode will be: