Question

Extraction of aluminium from aluminium oxide $\left(A{l}_2{O}_3\right)$ is best done by :

• A. electrolytic reduction of $A{l}_2{O}_3$
• B. reduction of $A{l}_2{O}_3$ with carbon
• C. reduction of $A{l}_2{O}_3$ wilh sodium
• D. reduction of $A{l}_2{O}_3$ with CO

Answer 1

The correct option is A electrolytic reduction of $A{l}_2{O}_3$

Aluminum metal is obtained by the electrolysis of fused alumina.

In this process, fused cryolite and fluorspar are added to alumina and the mixture melts at 900°C and alumina becomes a good conductor of electricity.

Here, metallic Al is liberated at the cathode.