Which of the following is not a basic condition for combustion?

Options

A. Fuel
B. Supporter of combustion
C. Ignition temperature
D. Presence of nitrogen

Answer

To determine which of the following is not a basic condition for combustion, let's analyze the fundamental requirements for combustion.

### Step-by-Step Solution:

1. **Understanding Combustion**:
- Combustion is a chemical process where a substance reacts rapidly with oxygen and releases energy in the form of heat and light.

2. **Identifying Basic Conditions for Combustion**:
- **Presence of Oxygen**: Oxygen is essential for combustion. It acts as an oxidizer that supports the burning process.
- **Presence of Inflammable Substance**: There must be a fuel (inflammable substance) that can burn. Without fuel, combustion cannot occur.
- **Source of Heat**: A source of heat is required to raise the temperature of the fuel to its ignition temperature, which is the minimum temperature at which it will ignite and burn.

3. **Analyzing the Options**:
- Based on the basic conditions identified, we can conclude that:
- Oxygen is necessary for combustion.
- An inflammable substance (fuel) is necessary for combustion.
- A source of heat is necessary to reach ignition temperature.
- **Presence of Nitrogen**: Nitrogen is an inert gas and does not support combustion. It does not contribute to the combustion process.

4. **Conclusion**:
- Therefore, the option that is **not a basic condition for combustion** is the presence of nitrogen.

### Final Answer:
The correct answer is the presence of nitrogen, as it does not support combustion.

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