Which of the following produces another air pollutant by reacting with oxides of nitrogen in prsence of sunlight ?

Options

A. `HCl`
B. `SO_(2)`
C. `O_(3)`
D. `HCN`gas

Answer

To solve the question regarding which substance produces another air pollutant by reacting with oxides of nitrogen in the presence of sunlight, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Oxides of Nitrogen**:
- The primary oxides of nitrogen that contribute to air pollution are Nitric Oxide (NO), Nitrogen Dioxide (NO2), and Nitrous Oxide (N2O).

2. **Analyze Each Option**:
- **Option 1: HCl**
- Reaction: NO + HCl → NOCl + H2O + 1/2 Cl2
- Result: This reaction produces NOCl, which is not classified as an air pollutant.
- Conclusion: Incorrect option.

- **Option 2: SO2**
- Reaction: NO + SO2
- Result: In the presence of sunlight, there is no reaction between NO and SO2.
- Conclusion: Incorrect option.

- **Option 3: O3 (Ozone)**
- Reaction: NO + O3 (in the presence of sunlight)
- Result: This reaction produces NO2 and O2.
- Conclusion: NO2 is a known air pollutant. Therefore, this option is correct.

- **Option 4: HCN**
- Reaction: HCN + NO
- Result: In the presence of sunlight, there is no significant reaction.
- Conclusion: Incorrect option.

3. **Final Conclusion**:
- The only substance that produces another air pollutant (NO2) by reacting with oxides of nitrogen (NO) in the presence of sunlight is Ozone (O3). Thus, the correct answer is **Option 3: O3**.