the apparatus used to coagulate carbon particles from smoke is called ,

Options

A. cottrel smoker
B. cottrell precipitator
C. cottell absorber
D. none of these

Answer

To solve the question regarding the apparatus used to coagulate carbon particles from smoke, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the name of the apparatus that is specifically designed to coagulate carbon particles from smoke.

2. **Identify the Options**: The options given are:
- Cottrell smoker
- Cottrell precipitator
- Cottrell absorber
- None of these

3. **Recall Relevant Concepts**: The Cottrell precipitator is a known device in chemistry and environmental science. It is used to remove particulate matter, including carbon particles, from industrial waste gases.

4. **Analyze the Function of Cottrell Precipitator**: The Cottrell precipitator works by charging the dust particles and then attracting them to charged grids or wires, effectively removing them from the gas stream.

5. **Select the Correct Answer**: Based on the function of the apparatus and its application, the correct answer to the question is **Cottrell precipitator**.

### Final Answer:
The apparatus used to coagulate carbon particles from smoke is called the **Cottrell precipitator**.

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