Question

Which of the following is an amphoteric oxide?

• A. Na$_2$O
• B. K$_2$O
• C. CO$_2$
• D. Al$_2$O$_3$

Hint:

Amphoteric oxides react with both acids and bases (e.g., Al$_2$O$_3$, ZnO).

Answer 1

The Correct Option is D

Concept: Amphoteric oxides are oxides that react with both acids and bases to form salt and water. Explanation:

• Na$_2$O and K$_2$O are basic oxides.
• CO$_2$ is an acidic oxide.
• Al$_2$O$_3$ reacts with both acids and bases, showing amphoteric nature.

Conclusion: Aluminium oxide (Al$_2$O$_3$) is an amphoteric oxide.