Two components of automobile exhausts, which can interact to produce secondary pollutants are

Options

A. Carbon monoxide and nitrogen oxides
B. Nitrogen oxides and hydrocarbons
C. Carbon dioxides and sulphur dioxide
D. Sulphur and nitrogen oxides.

Answer

To answer the question about the two components of automobile exhaust that can interact to produce secondary pollutants, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Primary Pollutants**:
- Primary pollutants are substances that are emitted directly into the atmosphere from sources such as vehicle emissions. Common primary pollutants from automobiles include nitrogen oxides (NOx) and hydrocarbons (HC).

2. **Identify the Interaction**:
- When primary pollutants interact, they can lead to the formation of secondary pollutants. Secondary pollutants are not emitted directly but form in the atmosphere through chemical reactions.

3. **Recognize the Formation of Ozone**:
- One of the most significant secondary pollutants formed from the interaction of primary pollutants is ozone (O3). Ozone is formed when nitrogen oxides (NOx) and hydrocarbons (HC) react in the presence of sunlight.

4. **Evaluate the Options**:
- The question provides multiple options to choose from. We need to identify which combination includes both nitrogen oxides and hydrocarbons.
- **Option Analysis**:
- **Option A**: Carbon monoxide and nitrogen oxide - does not include hydrocarbons.
- **Option B**: Nitrogen oxide and hydrocarbons - this is the correct combination that leads to the formation of ozone.
- **Option C**: Carbon Dioxide and Sulphur Dioxide - does not include nitrogen oxides or hydrocarbons.
- **Option D**: Sulphur and Nitrogen Oxide - does not include hydrocarbons.

5. **Conclusion**:
- The two components of automobile exhaust that can interact to produce secondary pollutants are **nitrogen oxide (NOx)** and **hydrocarbons (HC)**.

### Final Answer:
The two components of automobile exhaust that can interact to produce secondary pollutants are nitrogen oxide (NOx) and hydrocarbons (HC).

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