The fire extinguisher 'pyrene' contains

Options

A. Carbon dioxide
B. Carbon disulphide
C. Carbon tetrachloride
D. Chloroform

Answer

To answer the question regarding the composition of the fire extinguisher 'pyrene', we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fire Extinguishers**:
- Fire extinguishers are devices used to put out small fires. They work by removing one of the elements of the fire triangle: heat, fuel, or oxygen.

2. **Identifying Pyrene**:
- The term 'pyrene' in the context of fire extinguishers refers to a specific type of fire extinguishing agent.

3. **Chemical Composition**:
- The main chemical used in some fire extinguishers, including those referred to as 'pyrene', is Carbon Tetrachloride (CCl4).

4. **Mechanism of Action**:
- Carbon Tetrachloride works by creating a dense cloud of gas that excludes oxygen from the fire, effectively suffocating it.

5. **Toxicity Considerations**:
- It is important to note that while CCl4 is effective in controlling fires, it can decompose upon heating to produce toxic gases such as phosgene (COCl2) and hydrogen chloride (HCl).

6. **Conclusion**:
- Therefore, the fire extinguisher 'pyrene' contains Carbon Tetrachloride (CCl4).

### Final Answer:
The fire extinguisher 'pyrene' contains Carbon Tetrachloride (CCl4).

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