Give reasons for the following :
(i) Nitric oxide become brown on exposure to air

Explanation

To answer the question "Give reasons for the following: (i) Nitric oxide becomes brown on exposure to air," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nitric Oxide (NO)**:
- Nitric oxide is a colorless gas that is highly reactive. It is often found in the atmosphere as a pollutant and is produced from various combustion processes.

2. **Exposure to Air**:
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