Aluminium oxide is classified as an amphoteric oxide. (Textual Book)

Ans.

1. Aluminium oxide have acidic as well as basic functions and reacts with acids as well as alkalies to form salt and water.
2. An oxide which can have acidic as well as basic functions is called an amphoteric oxide. They react with acids as well as bases to form salt and water.
3. Hence, Aluminium oxide (Al₂O₃) is classified as an amphoteric oxide.