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Which of the following is a secondary air pollutant?

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+1 vote
in Environmental Engineering by (81.4k points)
Which of the following is a secondary air pollutant?

(a) SPM

(b) PAN

(c) SO2

(d) NO2

I had been asked this question at a job interview.

My query is from Air Pollutants in division Air Pollution of Environmental Engineering

1 Answer

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by (693k points)
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Best answer
Correct answer is (b) PAN

Explanation: Peroxy Acetyl Nitrate is a secondary air pollutant whereas, Suspended Particulate Matter, SO2 and NO2 are primary air pollutants.

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