What are amphoteric oxides? Choose the amphoteric oxides from amongst the following oxides: `Na_2O, ZnO, Al_2O_3 , CO_2H_2O`

Explanation

### Step-by-Step Solution:

1. **Definition of Amphoteric Oxides**:
Amphoteric oxides are metal oxides that can react with both acids and bases. This means they can exhibit both acidic and basic properties depending on the nature of the reacting substance.

2. **Identifying the Given Oxides**:
The oxides provided in the question are:
- Na₂O (Sodium oxide)
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