Question

Assertion (A): Aluminium is obtained from its oxide by electrolysis (Hall-Heroult process).

Reason (R): Aluminium is generally not found in the form of aluminium oxide.

विकल्प

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true but R is not the correct explanation of A.

Explanation:

Aluminium is extracted by electrolysis of alumina in the Hall-Heroult process. Aluminium is generally found as bauxite/hydrated oxide rather than pure aluminium oxide; however, the real reason for electrolysis is that alumina is very stable and cannot be reduced by common reducing agents. Thus both are true but R is not the correct explanation.