When the carbon dioxide is sprayed on a burning material, the gas forms a _____ over the object and puts the fire out.

Options

A. Blanket
B. Bubble
C. Clouds
D. None of them

Answer

To solve the question, we need to identify what happens when carbon dioxide (CO2) is sprayed on a burning material.

### Step-by-Step Solution:

1. **Understanding Carbon Dioxide**:
- Carbon dioxide is a colorless, odorless gas that is heavier than air. It is produced during combustion and is known for its ability to extinguish flames.

2. **Mechanism of Action**:
- When carbon dioxide is sprayed on a fire, it displaces oxygen around the burning material. Since fire requires oxygen to sustain combustion, reducing the oxygen concentration effectively puts out the fire.

3. **Formation of a Barrier**:
- As carbon dioxide is released, it forms a layer or barrier over the burning material. This barrier acts like a blanket, preventing oxygen from reaching the flames.

4. **Conclusion**:
- Therefore, when carbon dioxide is sprayed on a burning material, it forms a "blanket" over the object and puts the fire out.

### Final Answer:
When carbon dioxide is sprayed on a burning material, the gas forms a **blanket** over the object and puts the fire out.

---