Introduction to Air Pollutants & Troposhpheric Pollutants
Which of the ...
Question
Which of the following is a secondary pollutant?
A
NO
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B
SO2
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C
PAN
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D
NO2
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Solution
The correct option is C
PAN
Secondary pollutants are formed by the interaction with primary pollutants. PAN or peroxyacyl nitrate is a secondary pollutant, while NO, NO2 and SO2 are examples of primary pollutants.