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Which of the following statement about pollutants is incorrect ?

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By Expert Faculty of Sri Chaitanya
a
SO3 is a primary pollutant and it is also a component of classical smog
b
NO is a primary pollutant and it is also a component of photochemical smog
c
CH4 is a primary pollutant and also a green house gas
d
PAN is a secondary pollutant and a component of Los Angles smog

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detailed solution

Correct option is A

SO3 is a secondary pollutant and it is not a component of classical smog ;

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Which of the following is the major particulate pollutants?
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