Which is the following metallic oxides exhibit amphoteric nature ?

Options

A. `BaO`
B. `Al_(2)O_(3)`
C. `Na_(2)O`
D. `CaO`

Explanation

To determine which metallic oxides exhibit amphoteric nature, we need to understand what amphoteric means. Amphoteric substances can react both as acids and bases.

### Step-by-Step Solution:

1. **Define Amphoteric Nature**: Amphoteric oxides can react with both acids and bases. They can neutralize both acidic and basic solutions.

2. **Identify Common Metallic Oxides**: Some common metallic oxides include:
- Sodium oxide (Na2O)
- Magnesium oxide (MgO)
- Calcium oxide (CaO)
- Aluminium oxide (Al2O3)
- Barium oxide (BaO)

3. **Classify the Oxides**:
- **Basic Oxides**: Sodium oxide (Na2O), Barium oxide (BaO), Calcium oxide (CaO) are primarily basic.
- **Amphoteric Oxides**: Aluminium oxide (Al2O3) is known for its amphoteric nature, as it can react with both acids and bases.
- **Neutral Oxides**: Some oxides like ZnO can also be amphoteric but are not always classified as metallic oxides.

4. **Conclusion**: Among the common metallic oxides listed, Aluminium oxide (Al2O3) is the primary example of an amphoteric oxide.

### Final Answer:
The metallic oxide that exhibits amphoteric nature is **Aluminium oxide (Al2O3)**.

---