The correct answer is C. Peroxyacetyl nitrate (PAN).
PAN is a powerful eye irritant present in smog. It is a secondary pollutant, meaning that it is formed in the atmosphere by the reaction of primary pollutants, such as nitrogen oxides and volatile organic compounds. PAN is a colorless gas with a pungent odor. It is highly reactive and can damage plants, animals, and humans.
Nitric oxide (NO) is a colorless, odorless gas that is produced by the combustion of fossil fuels. It is also a major component of smog. NO is not directly harmful to humans, but it can react with other pollutants to form harmful compounds, such as PAN.
Sulphur dioxide (SO2) is a colorless, odorless gas that is produced by the burning of fossil fuels that contain sulfur. It is also a major component of smog. SO2 can irritate the eyes, nose, and throat. It can also cause respiratory problems, such as asthma and bronchitis.
Carbon dioxide (CO2) is a colorless, odorless gas that is produced by
the burning of fossil fuels. It is also a natural component of the atmosphere. CO2 is not directly harmful to humans, but it can contribute to climate change.In conclusion, the correct answer is C. Peroxyacetyl nitrate (PAN). PAN is a powerful eye irritant present in smog. It is a secondary pollutant, meaning that it is formed in the atmosphere by the reaction of primary pollutants, such as nitrogen oxides and
volatile organic compounds. PAN is a colorless gas with a pungent odor. It is highly reactive and can damage plants, animals, and humans.