To reduce unburnt hydrocarbon in auto emissions, the device used is

Options

A. scrubber
B. catalytic converter
C. cyclonic separator
D. trajectory separator

Answer

To solve the question about which device is used to reduce unburnt hydrocarbons in auto emissions, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for a device that reduces unburnt hydrocarbons in auto emissions.

2. **Review the Options**: The options provided are:
- Scrubber
- Catalytic Converter
- Cyclonic Separator
- Trajectory Separator

3. **Analyze Each Option**:
- **Scrubber**: This device is primarily used to remove air particles from polluted air. It is not specifically designed for reducing unburnt hydrocarbons.
- **Catalytic Converter**: This is an exhaust system component that is specifically designed to reduce harmful gases, including unburnt hydrocarbons, carbon monoxide, and other pollutants from the exhaust gases of an engine.
- **Cyclonic Separator**: This device is used to separate particles from dirty water and is not applicable to air emissions.
- **Trajectory Separator**: This is used for the separation of small and nonferrous particles and does not relate to reducing hydrocarbons in auto emissions.

4. **Identify the Correct Answer**: Based on the analysis, the **Catalytic Converter** is the device that reduces unburnt hydrocarbons in auto emissions.

5. **Conclusion**: Therefore, the correct answer to the question is the **Catalytic Converter**.

### Final Answer:
The device used to reduce unburnt hydrocarbons in auto emissions is the **Catalytic Converter**.

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