Down's cell is used for the electrolysis of:

Explanation

Down's cell is used for the electrolysis of molten sodium chloride (NaCl) to produce sodium metal and chlorine gas. It's a type of electrolytic cell used in the industrial production of sodium and chlorine. The cell consists of a steel container with a graphite lining. Molten sodium chloride (commonly known as table salt) is placed in the container and serves as the electrolyte. A graphite anode and a cathode are inserted into the electrolyte. During the electrolysis process, an electric current is passed through the molten salt, causing it to undergo electrolysis. The overall reactions occurring at the anode and cathode are as follows: At the anode (oxidation): 2Cl^- (molten) → Cl2 (g) + 2e^- At the cathode (reduction): 2Na^+ (molten) + 2e^- → 2Na (l)