Question

Amphoteric oxide is:
1. Na₂O
2. Al₂O₃
3. CaO
4. K₂O

Answer 1

Correct Answer - Option 2 : Al₂O₃

An amphoteric compound is a molecule or ion that can react both as an acid and as a base.

• Examples of Amphoteric oxides are aluminium oxide(Al2O3) and zinc oxide(ZnO).

Amphoteric	Al2O3
Amphoteric	Ga2O3

• Na2O, Sodium oxide is a simple strongly basic oxide.
• K2O, Potassium oxide is a basic oxide.
• CaO, Calcium oxide is a basic oxide because it dissolves in water to form calcium hydroxide.