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Multiple choice

A powerful eye irritant present in smog is

  1. ozone

  2. nitric oxide

  3. peroxyacetyl nitrate

  4. sulphur dioxide

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Peroxyacetyl nitrate (PAN) is a secondary pollutant formed in photochemical smog that causes severe eye irritation. While ozone is also present in smog, PAN is specifically known as a powerful eye irritant.

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