Question:

Peroxyacetyl nitrate (PAN), an eye irritant is produced by :

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PAN forms when hydrocarbons, nitrogen oxides and sunlight interact; it is a typical component of photochemical smog.
Updated On: Nov 5, 2026
  • classical smog
  • acid rain
  • photochemical smog
  • organic waste
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The Correct Option is C

Solution and Explanation

Photochemical smog forms in sunlight when unburnt hydrocarbons and nitrogen oxides from vehicle exhaust react. Its secondary pollutants include ozone, formaldehyde, acrolein and peroxyacetyl nitrate (PAN), \(\mathrm{CH_3COOONO_2}\), which cause eye irritation.
Classical smog (smoke + fog, reducing, with \(\mathrm{SO_2}\)) and acid rain do not produce PAN.
Answer: (3) photochemical smog
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