Question

Oxides of aluminium and zinc are :

• A. acidic
• B. basic
• C. amphoteric
• D. neutral

Answer 1

The Correct Option is C

Step 1: Understanding amphoteric oxides:
An amphoteric oxide is one that can react both as an acid and as a base. This means that it can react with both acids and bases to form salts and water.

Step 2: Identifying the oxides of aluminium and zinc:
- Aluminium oxide (Al₂O₃) and zinc oxide (ZnO) are examples of amphoteric oxides.
- Aluminium oxide reacts with acids to form salts like aluminium chloride and with bases to form aluminate ions.
- Zinc oxide reacts with acids to form zinc salts and with bases to form zincates.

Step 3: Conclusion:
Both aluminium oxide and zinc oxide are amphoteric because they can react with both acids and bases. Therefore, the correct answer is amphoteric.