(i) Name the most common ore of the metal aluminum from which the metal is extracted. Write the chemical formula of the ore.

(i) Name the most common ore of the metal aluminum from which the metal
is extracted. Write the chemical formula of the ore.

(ii) Name the process by which impure ore of aluminum gets purified by using concentrated solution of an alkali.

(iii) Write the equation for the formation of aluminum at the cathode during the electrolysis of alumina.