Same chapter3 marksDifficulty: Medium
Suggest three ways in which air pollution from vehicles can be reduced.
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3 marksDifficulty: Medium
What is photochemical smog and how is it formed?
Original Khojo Papers practice question — not from a past board paper.
Answer
Photochemical smog is a brownish haze that forms over cities on warm sunny days. Oxides of nitrogen and unburnt hydrocarbons from vehicle exhausts react in sunlight to give ozone, peroxyacetyl nitrate and other irritants. It causes eye and throat irritation, breathing difficulty and damage to plants.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
It is worst in cities with heavy traffic, strong sunlight and little wind.
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