a. Classify following oxides as neutral, acidic, basic or atphoteric: `CO,B_(2)O_(3),SiO_(2),CO_(2),Al_(2)O_(3),PbO_(2),Tl_(2)O_(3)`.
b. Write suitable chemical reaction to show their nature.

Explanation

To classify the given oxides as neutral, acidic, basic, or amphoteric, we will analyze each oxide and provide suitable chemical reactions to demonstrate their nature.

### Step-by-Step Solution:

**a. Classification of Oxides:**

1. **Carbon Monoxide (CO)**:
- **Classification**: Neutral
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