Which one of the following statements regarding photochemical smog is not correct?

Options

A. Photochemical smog is formed through photochemical reaction involving solar energy
B. Photochemical smog does not cause irritation in eyes and throat
C. Carbon monoxide does not play any role in photochemical smog formation
D. Photochemical smog is an oxidising agent in character

Answer

To determine which statement regarding photochemical smog is not correct, let's analyze each option provided:

### Step 1: Analyze Option A
**Statement:** Photochemical smog is formed through photochemical reactions involving solar energy.
**Analysis:** This statement is correct. Photochemical smog forms in the presence of sunlight, where various pollutants undergo chemical reactions, particularly in warm and dry conditions.

### Step 2: Analyze Option B
**Statement:** Photochemical smog does not cause irritation in eyes and throat.
**Analysis:** This statement is incorrect. Photochemical smog contains harmful substances such as ozone, nitric oxide, and acrolein, which are known to cause irritation in the eyes and throat, as well as other respiratory issues. Therefore, this option is the one that is not correct.

### Step 3: Analyze Option C
**Statement:** Carbon monoxide does not play any role in photochemical smog formation.
**Analysis:** This statement is misleading. While carbon monoxide itself is not a primary component of photochemical smog, it can contribute to the overall pollution and may interact with other pollutants. However, the primary components of photochemical smog are ozone and nitrogen oxides. Thus, while the statement is somewhat correct, it does not directly relate to the formation of photochemical smog.

### Step 4: Analyze Option D
**Statement:** Photochemical smog is an oxidizing agent in character.
**Analysis:** This statement is correct. Photochemical smog is characterized by the presence of ozone, which is a strong oxidizing agent. Therefore, this statement is accurate.

### Conclusion
The statement that is not correct regarding photochemical smog is **Option B**: "Photochemical smog does not cause irritation in eyes and throat."

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