In which process does a chemical change occur when an electric current is passed through it?

Describe the method of obtaining chlorine from brine (sea water) and write the oxidation-reduction reactions,specifying the products at the anode and cathode.

Which of the following will give $H_{2(g)}$ at cathode and $O_{2(g)}$ at anode on electrolysis using platinum electrodes?

Which one of the following reactions occurs at the anode in the Castner process of extracting sodium metal?

During the electrolysis of cryolite,aluminium and fluorine are formed in $........$ molar ratio :

Reduction of water is carried out near the cathode in the presence of aqueous $Na^{+}$ ions. Explain why.