Which of the following atmospheric pollutants is not produced by the exhaust of motor vehicle in Delhi?

Options

A. `SO_(2)`
B. Hydrocarbon gases
C. Fly ash
D. CO

Answer

To determine which atmospheric pollutant is not produced by the exhaust of motor vehicles in Delhi, we can analyze the given options:

1. **SO2 (Sulfur Dioxide)**: This gas can be produced from the combustion of fossil fuels, especially those containing sulfur, such as diesel and petrol. Therefore, it is a pollutant that can be emitted from motor vehicle exhaust.

2. **Hydrocarbon gases**: These are the primary components of petrol and diesel. When these fuels are burned in internal combustion engines, they can produce hydrocarbon gases as a byproduct. Thus, hydrocarbon gases are also emitted from motor vehicles.

3. **Fly ash**: This is a byproduct of burning coal and is not typically associated with motor vehicle emissions. Fly ash is generated from power plants and industrial processes that burn coal, not from the combustion of petrol or diesel in vehicles.

4. **CO (Carbon Monoxide)**: This is a common pollutant produced by the incomplete combustion of fossil fuels in vehicles. Therefore, it is also emitted from motor vehicle exhaust.

After analyzing the options, the pollutant that is **not produced by the exhaust of motor vehicles** is **fly ash**.

**Final Answer**: Fly ash