Oxides of aluminium and zinc are :

Question

Among the following oxides of p-block elements, the number of oxides having amphoteric nature is: \[\text{Cl}_2\text{O}_7, \, \text{CO}, \, \text{PbO}_2, \, \text{N}_2\text{O}, \, \text{NO}, \, \text{Al}_2\text{O}_3, \, \text{SiO}_2, \, \text{N}_2\text{O}_5, \, \text{SnO}_2\]

Answer 1

Step 1: Definition of Amphoteric Oxides:
An oxide exhibiting both acidic and basic properties is termed amphoteric. Such oxides react with both acids and bases, yielding salts and water.

Step 2: Examples: Aluminium and Zinc Oxides:
- Aluminium oxide (Al₂O₃) and zinc oxide (ZnO) exemplify amphoteric oxides.
- Aluminium oxide reacts with acids to form salts (e.g., 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: Summary:
Aluminium oxide and zinc oxide are classified as amphoteric due to their ability to react with both acidic and basic substances. Consequently, the designation "amphoteric" is appropriate.

Oxides of aluminium and zinc are :

The Correct Option is C

Solution and Explanation

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