Photochemical smog is a secondary pollutant and it is generally formed:
Correct answer: B. Around mid-day in summer months
- A. In the morning of winters
- B. Around mid-day in summer months
- C. On a rainy day
- D. When the concentration of particulate matter is very low
Explanation
Photochemical smog formation requires sunlight to initiate the reactions between primary pollutants like nitrogen oxides and volatile organic compounds. These conditions are most prevalent on sunny, warm, dry days, typically during the summer months around midday when sunlight is most intense.
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About Environmental Chemistry
Atmospheric pollution includes smog, acid rain, greenhouse gases, ozone depletion and the effects of carbon monoxide, sulfur oxides, nitrogen oxides and particulate matter. Water pollution covers sewage, industrial waste, eutrophication and treatment stages, while green chemistry focuses on reducing hazardous substances, waste and energy use through safer, more efficient processes.
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