Question
Photochemical smog is a resultant of the reaction among
(a) NO2, O3 and peroxyacetyl nitrate in the presence of sunlight
(b) CO, O2 and peroxyacetyl nitrate in the presence of sunlight
(c) CO, CO2 and NO2 at low temperature
(d) High concentration of NO2, O3 and CO in the evening
Answer:
A
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Explanation:
Photochemical smog is a type of air pollution that occurs when pollutants such as nitrogen oxides (NOx), volatile organic compounds (VOCs), and sunlight interact. In the presence of sunlight, nitrogen dioxide (NO2), ozone (O3), and peroxyacetyl nitrate (PAN) undergo complex chemical reactions, leading to the formation of photochemical smog. These reactions produce various harmful pollutants, including tropospheric ozone, aldehydes, and other secondary pollutants.