In foam type fire-extinguisher what is responsible to put off fire?

Options

A. `H_(2)O`
B. `CO_(2)+H_(2)O`
C. `CO_(2)`
D. CO

Answer

To answer the question "In foam type fire-extinguisher what is responsible to put off fire?", we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Foam Type Fire Extinguishers**:
- Foam type fire extinguishers are specifically designed to combat fires caused by solid materials such as wood, glass fiber, and upholstery. These materials fall under the Class A category of fires.

2. **Mechanism of Action**:
- When a fire occurs, foam type fire extinguishers release a foam that is created from a mixture of water and a foaming agent. This foam is effective in smothering the fire.

3. **Role of Foam**:
- The foam works by covering the burning material, which helps to cut off the supply of oxygen that is essential for combustion. Without oxygen, the fire cannot continue to burn.

4. **Chemical Reactions**:
- In some cases, the foam may also involve chemical reactions that produce carbon dioxide (CO2) gas. This gas is released under pressure when the extinguisher is activated, further helping to suffocate the fire.

5. **Conclusion**:
- Therefore, the primary component responsible for extinguishing the fire in foam type fire extinguishers is the foam itself, which effectively cuts off the oxygen supply and smothers the flames.

### Summary:
In foam type fire extinguishers, the foam is responsible for putting off the fire by smothering it and cutting off the oxygen supply. Additionally, the release of carbon dioxide gas can also aid in extinguishing the fire.