Photochemical smog is formed from automobile exhaust ________________?
Correct answer: B. All A., B. & C.
- A. By reaction of hydrocarbon & nitric oxide in presence of sunlight
- B. All A., B. & C.
- C. Is harmful for crops and trees also besides causing eye irritation & asthma
- D. Appears only on sunny days
Explanation
Photochemical smog develops when hydrocarbons and nitrogen oxides from vehicle exhaust react in sunlight, producing oxidants such as ozone. It is associated with sunny conditions and can irritate the eyes and respiratory system while damaging crops and trees.
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