Neutral oxides are those oxides which do not show acidic or basic properties. They are neither acidic nor basic but may exhibit amphoteric properties.
1. Step 1: Understanding the given oxides:
- \( \text{Al}_2\text{O}_3 \): This is an amphoteric oxide because it reacts both as an acid and a base.
- \( \text{Cl}_2\text{O}_7 \): This is an acidic oxide, as it reacts with water to form an acidic solution.
- \( \text{N}_2\text{O} \): This is a neutral oxide, as it does not show acidic or basic properties.
- \( \text{CO} \): Carbon monoxide is a neutral oxide, as it does not exhibit acidic or basic properties.
2. Step 2: Identify the neutral oxides:
The neutral oxides in the options are \( \text{N}_2\text{O} \) (dinitrogen monoxide) and \( \text{CO} \) (carbon monoxide).
Thus, the correct answer is (B) \( \text{N}_2\text{O}, \text{CO} \).