In incomplete combustion, the leftover carbon particles from the combustible substance form ____ .

Options

A. Soot
B. Ash
C. Carbon monoxide
D. Carbon dioxide

Answer

**Step-by-Step Solution:**

1. **Understanding Combustion**: Combustion is a chemical reaction that typically occurs when a substance reacts with oxygen to produce heat and light. It can be complete or incomplete.

2. **Complete vs. Incomplete Combustion**:
- In complete combustion, there is a sufficient supply of oxygen, and the products are mainly carbon dioxide (CO2) and water (H2O).
- In incomplete combustion, there is a limited supply of oxygen, which prevents the fuel from burning completely.

3. **Products of Incomplete Combustion**: During incomplete combustion, the fuel does not convert entirely into carbon dioxide. Instead, some of the carbon remains unburned.

4. **Formation of Carbon Particles**: The leftover carbon particles that do not combust fully in the presence of limited oxygen form solid particles known as soot.

5. **Conclusion**: Therefore, in incomplete combustion, the leftover carbon particles from the combustible substance form soot.

**Final Answer**: In incomplete combustion, the leftover carbon particles from the combustible substance form soot.

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