Which device is fitted to automobiles for reducing the emission of poisonous gases like `NO_2` and CO?

Options

A. catalytic converters
B. electrostatic precipitator
C. scrubber
D. bag filter

Answer

**Step-by-Step Solution:**

1. **Identify the Problem**: The question asks for a device that is used in automobiles to reduce the emission of poisonous gases such as nitrogen dioxide (NO2) and carbon monoxide (CO).

2. **List the Options**: The options provided are:
- A) Catalytic converter
- B) Electrostatic precipitator
- C) Scrubber
- D) Bag filter

3. **Analyze Each Option**:
- **A) Catalytic Converter**: This device is specifically designed to reduce harmful emissions from automobile exhaust. It converts harmful gases like NO2 and CO into less harmful substances.
- **B) Electrostatic Precipitator**: This device is primarily used in industrial applications to remove particles from exhaust gases but is not typically used in automobiles.
- **C) Scrubber**: This device is used to remove pollutants from industrial exhaust gases, not specifically for automobiles.
- **D) Bag Filter**: This is used to filter out particulate matter from industrial emissions, not for reducing gases in automobiles.

4. **Conclusion**: The catalytic converter is the only device among the options that is specifically designed to reduce emissions of poisonous gases in automobiles.

5. **Final Answer**: The correct answer is A) Catalytic converter.

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