The most abundant hydrocarbon pollutant is :

Options

A. Methane
B. Ethane
C. Propane
D. Butane

Answer

**Step-by-Step Text Solution:**

1. **Identify the Question**: The question asks for the most abundant hydrocarbon pollutant in the atmosphere.

2. **Consider the Options**: The options provided are methane, ethane, propane, and butane.

3. **Analyze Each Option**:
- **Methane (CH4)**: This is a simple hydrocarbon and is known to be a significant atmospheric pollutant. It is produced from various sources, including natural gas extraction and automobile exhaust.
- **Ethane (C2H6)**: While ethane is a hydrocarbon, it is less abundant in the atmosphere compared to methane.
- **Propane (C3H8)**: Similar to ethane, propane is also a hydrocarbon but is not as prevalent as methane.
- **Butane (C4H10)**: Butane is another hydrocarbon that is less common in the atmosphere compared to methane.

4. **Conclusion**: Based on the analysis, methane is identified as the most abundant hydrocarbon pollutant in the atmosphere, accounting for approximately 60 to 80% of hydrocarbon pollutants.

5. **Final Answer**: The most abundant hydrocarbon pollutant is **methane (CH4)**.

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