Photochemical smog is formed from automobile exhaust
Photochemical smog is formed from automobile exhaust

Q. Photochemical smog is formed from automobile exhaust

  1. By reaction of hydrocarbon & nitric oxide in presence of sunlight
  2. Appears only on sunny days
  3. Is harmful for crops and trees also besides causing eye irritation & asthma
  4. All (a), (b) & (c)

Answer: Option 4

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