Q.
All are primary pollutants except
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a
SO2
b
H2SO4
c
NO2
d
Particulate matter
answer is B.
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Detailed Solution
Primary air pollutants: Pollutants that are formed and emitted directly from particular sources. Examples are particulates, carbon monoxide, nitrogen oxide, and sulfur oxide, Particulate matter, Mercury, Volatile organic compounds ..etc.
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