State as to why alkali metals are prepared by electrolysis of their fused chlorides?

Explanation

As alkali metals are strong reducing agents, they cannot be extracted by chemical reduction from their oxides or other compounds. (b) As alkali metals are highly electropositive, these metals cannot be displaced from its salts with the help of other elements. (c) Alkali metals cannot be obtained even by the electrolysis of aqueous solutions of their salts. In this case, `H_2`, instead of the alkali metal is liberated at the cathode because discharge potential of alkali metals is higher than that of hydrogen. Thus, to prepare alkali metals, electrolysis of their fused chlorides is carried out. For example, and at the anode, `2Cl^(-) to Cl_2 + 2e`