Q. Which of the following pairs of air pollutants and their sources are correctly matched?
1.Carbon Monoxide (CO) – Incomplete combustion of petrol and diesel
2.Carbon Dioxide (CO₂) – Burning of fossil fuels like coal and oil
3.Chlorofluorocarbons (CFCs) – Emissions from air conditioning and refrigeration units
Select the correct answer using the code given below:
Answer: D
Notes:
Explanation:
- CO is produced by the incomplete combustion of carbon-based fuels like petrol, diesel, and wood.
- CO₂ is emitted primarily from burning coal, oil, and natural gas – key human activities causing greenhouse emissions.
- CFCs are released from air conditioners and refrigerators, especially older models – they damage the ozone layer.
Source: Environment (N.C.E.R.T)
