Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
To extract a highly reactive metal (which are high up in the reactivity series) the process of extraction is done by the electrolytic reduction of their molten chlorides or oxides.
Example: Sodium metal is extracted by the electrolytic reduction of molten sodium chloride. When electric current is passed through molten sodium chloride, it decomposes to form sodium metal and chlorine gas.