WBCS.LIVE practice question

Which of the following highly toxic environmental compounds is strictly classified as a secondary air pollutant?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Carbon monoxide (CO)
  2. Sulfur dioxide (SO2)
  3. Peroxyacetyl nitrate (PAN)
  4. Nitrogen oxide (NO)

Correct answer and explanation

Correct answer: Peroxyacetyl nitrate (PAN)

Explanation: āœ… Correct Answer: C) Peroxyacetyl nitrate (PAN) šŸ“š Explanation: Primary pollutants (like CO and SO2) are emitted directly into the atmosphere from a specific source, such as a car exhaust or factory chimney. A secondary pollutant is never emitted directly; instead, it is formed in the atmosphere when primary pollutants undergo complex chemical reactions. Peroxyacetyl nitrate (PAN) is a highly dangerous secondary pollutant formed during photochemical smog.