Question

Aluminium is obtained by the electrolysis of molten aluminium oxide. A metal just below aluminium in the reactivity series can be extracted by which method easily:

• A. Just by heating its ore in air.
• B. By the electrolytic reduction of its molten salt.
• C. By converting its sulphides to the metal oxide by heating in the presence of excess air.
• D. None of these

Answer 1

The correct option is C

By converting its sulphides to the metal oxide by heating in the presence of excess air.

The metal just below aluminium in the reactivity series is Zinc. Zinc can be extracted by converting its sulphide to oxides. And then zinc oxide can be reduced to zinc by using carbon as a reducing agent.