Incomplete combustion of fuel such as petrol and diesel gives

Options

A. nitrogen oxide
B. carbon monoxide
C. sulphur dioxide
D. carbon dioxide

Answer

**Step-by-Step Solution:**

1. **Understanding Combustion**: Combustion is a chemical reaction that occurs when a fuel reacts with oxygen to produce energy, heat, and various gases. There are two types of combustion: complete and incomplete.

2. **Complete vs. Incomplete Combustion**:
- **Complete Combustion**: This occurs when there is enough oxygen available, resulting in the production of carbon dioxide (CO2) and water (H2O).
- **Incomplete Combustion**: This occurs when there is insufficient oxygen, leading to the production of carbon monoxide (CO), along with other possible products like soot or other hydrocarbons.

3. **Identifying the Fuels**: The question specifically mentions petrol and diesel, which are hydrocarbon fuels commonly used in vehicles.

4. **Products of Incomplete Combustion**: When petrol and diesel undergo incomplete combustion, the primary harmful product formed is carbon monoxide (CO). This gas is colorless, odorless, and highly toxic.

5. **Analyzing the Options**:
- **Nitrogen Oxide**: While nitrogen oxides are pollutants, they are not primarily produced from incomplete combustion.
- **Carbon Monoxide**: This is the correct answer, as it is a direct result of incomplete combustion.
- **Sulfur Oxide**: This gas is produced from the burning of fuels that contain sulfur, but it is not a product of incomplete combustion.
- **Carbon Dioxide**: This gas is produced during complete combustion, not incomplete combustion.

6. **Conclusion**: Therefore, the correct answer to the question is that incomplete combustion of fuel such as petrol and diesel gives carbon monoxide.

**Final Answer**: Incomplete combustion of fuel such as petrol and diesel gives carbon monoxide.

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