Question

Explain the process by which metals is obtained from its molten chloride.

Answer 1

The highly reactive metals like K,Na,Ca, and Mg are extracted by the electrolysis of their molten chloride.
for example:
Extraction of sodium metal:
Sodium metal is extracted by the electrolytic reduction of molten chloride.
when electric current is passed through molten sodium chloride , it decomposes to form sodium and chlorine gas.
2NaCl(l)-----------------> 2Na  +Cl2 (gas)
               electrolysis

Answer 2

It can be done through electrolytic reduction. 
for example

sodium is extracted from molten chloride.
at cathode: Na+   + e-→Na
at anode: Cl→ Cl- + e-