Incomplete combustion gives :

Options

A. `CO_2`
B. `CO`
C. Carbon
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Combustion:**
- Combustion is a chemical reaction that occurs when a substance (usually a hydrocarbon) reacts with oxygen. This process typically releases energy in the form of heat and light.

2. **Types of Combustion:**
- There are two types of combustion: complete combustion and incomplete combustion.
- **Complete Combustion:** This occurs when there is a sufficient supply of oxygen. The products of complete combustion of carbon are carbon dioxide (CO2) and energy.
- **Incomplete Combustion:** This occurs when there is an insufficient supply of oxygen. The products of incomplete combustion can include carbon monoxide (CO), soot (carbon particles), and other compounds.

3. **Identifying the Products of Incomplete Combustion:**
- In incomplete combustion, carbon does not fully oxidize to carbon dioxide. Instead, it forms carbon monoxide (CO) as a primary product.
- For example, if carbon (C) reacts with limited oxygen (O2), the reaction can be represented as:
\[ 2C + O2 \rightarrow 2CO \]
- Here, carbon monoxide (CO) is produced instead of carbon dioxide (CO2).

4. **Conclusion:**
- Therefore, the gas released during incomplete combustion is carbon monoxide (CO).

**Final Answer:**
- Incomplete combustion gives carbon monoxide (CO).

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