Photochemical smog involves

Options

A. `O_(3)`
B. NO
C. `NO_(2)`
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Photochemical Smog:**
Photochemical smog is a type of air pollution that occurs when sunlight reacts with pollutants in the atmosphere. It is commonly associated with urban areas where there are high levels of vehicle emissions and industrial activities.

2. **Identifying Key Components:**
The main components of photochemical smog include:
- Ozone (O₃)
- Nitric oxide (NO)
- Nitrogen dioxide (NO₂)
- Other organic compounds

3. **Role of UV Rays:**
The formation of photochemical smog is primarily driven by ultraviolet (UV) rays from the sun. These rays facilitate the chemical reactions that lead to the formation of ozone and other pollutants.

4. **Analyzing the Options:**
The question provides the following options:
- A) O₃ (Ozone)
- B) NO (Nitric oxide)
- C) NO₂ (Nitrogen dioxide)
- D) All of these

5. **Conclusion:**
Since photochemical smog contains ozone, nitric oxide, and nitrogen dioxide, the correct answer is:
**D) All of these.**

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