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Q.

Which among the following is not a "secondary air pollutant"?

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a

PANs

b

Ozone

c

Secondary organic aerosol (haze)

d

Carbon monoxide

answer is D.

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Detailed Solution

  • Those pollutants which form in the atmosphere are called Secondary pollutants. 
  • These secondary pollutants do not come directly from a source but form as a result of the reaction of primary pollutants with the molecules in the atmosphere.
  • E.g., Ozone, PANs, etc.,
  • Different types of primary pollutants include Nitrogen oxides (NOx), Carbon monoxide (CO), Volatile organic compounds (VOCs).
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