Which of the following is a method used to get rid of particulate matter present in the exhaust from a thermal power plant ?

Options

A. Magnetic precipitators
B. Chromatography
C. Electrostatic precipitators
D. Mass spectrometry

Explanation

To solve the question regarding the method used to eliminate particulate matter from the exhaust of a thermal power plant, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify a method that effectively removes particulate matter from the exhaust of thermal power plants.

2. **Review the Options**: The options provided are:
- Magnetic precipitators
- Chromatography
- Electrostatic precipitators
- Mass spectrometry

3. **Evaluate Each Option**:
- **Magnetic Precipitators**: These are not commonly used for removing particulate matter from exhaust gases.
- **Chromatography**: This technique is used for separating mixtures, not specifically for removing particulate matter from exhaust.
- **Electrostatic Precipitators**: These devices are specifically designed to remove particulate matter from exhaust gases. They work by charging the particles and collecting them on plates.
- **Mass Spectrometry**: This is an analytical technique used to measure the mass-to-charge ratio of ions and is not used for removing particulate matter.

4. **Identify the Correct Method**: Among the options, the electrostatic precipitators are known for their efficiency in removing up to 99% of particulate matter from the exhaust of thermal power plants.

5. **Conclusion**: The correct answer is **Electrostatic Precipitators**.

### Final Answer:
**Electrostatic Precipitators**

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