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State PCS PYQPrelims 2018

UPPCS · Question 137

A powerful eye irritant in the smoke is

  1. Ozone
  2. Sulphur dioxide
  3. Carbon dioxide
  4. Peroxyacetyl nitrate
Show answer & explanation

Answer: (D) Peroxyacetyl nitrate

Explanation

Peroxyacetyl nitrate (PAN), a component of photochemical smog, is a strong eye irritant (lachrymator).