Combustion of coal, petrol, diesel etc. is q the basic source:

Options

A. Water pollution
B. Land pollution
C. Air pollution
D. Noise pollution

Explanation

**Step-by-Step Solution:**

1. **Understanding Combustion**: Combustion is a chemical reaction that typically involves the burning of a fuel in the presence of oxygen, resulting in the release of energy. Common fuels include coal, petrol, and diesel.

2. **Combustion of Coal**: When coal undergoes combustion, it primarily produces carbon dioxide (CO2) as a byproduct. The reaction can be represented as:
\[ \text{C (coal)} + \text{O}_2 \rightarrow \text{CO}_2 \]

3. **Combustion of Petrol and Diesel**: Petrol and diesel are hydrocarbon fuels, and their combustion also produces carbon dioxide (CO2) along with water (H2O). The general reaction can be represented as:
\[ \text{C}_x\text{H}_y + \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O} \]
Here, \( C_xH_y \) represents the hydrocarbon structure of petrol or diesel.

4. **Combustion of Nitrogen**: While nitrogen is not a fuel, it is present in the air and can react during combustion processes. Incomplete combustion can lead to the formation of nitrogen oxides (NO and NO2). The reaction can be represented as:
\[ \text{N}_2 + \text{O}_2 \rightarrow 2\text{NO} \]
\[ 2\text{NO} + \text{O}_2 \rightarrow 2\text{NO}_2 \]

5. **Air Pollution**: The gases produced from the combustion of coal, petrol, and diesel (CO2 and NO2) contribute to air pollution. Carbon dioxide is a greenhouse gas, while nitrogen oxides are known to cause respiratory problems and contribute to smog formation.

6. **Conclusion**: The combustion of these fuels primarily results in air pollution due to the release of CO2 and nitrogen oxides (NO2). They do not significantly contribute to water pollution, land pollution, or noise pollution.

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