Which of the following is produced by the electrolysis of molten $NaCl$?

The products obtained at the cathode and anode respectively during the electrolysis of aqueous $K_2SO_4$ solution using platinum electrodes are

When electric current is passed through a cell having an electrolyte,the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution,what happens to the ions?

An apparatus used for the measurement of the quantity of electricity is known as a

For the extraction of sodium from $NaCl$,an electrolytic mixture of $NaCl + Na_3AlF_6 + CaCl_2$ is used. During the extraction process,only sodium is deposited at the cathode,while $K$ and $Ca$ are not,because:

Anodized aluminum is ...