NEET Biology question

Not in NEET syllabus

Given below are some differences between primary air pollutants and secondary air pollutants. Which one of the following is an incorrect difference?

(A)Primary air pollutants – These persist in the form in which they are added to the environment; Secondary air pollutants – These are formed by interaction among the primary pollutants
(B)Primary air pollutants – These are more toxic than the secondary pollutants; Secondary air pollutants – These are less toxic than primary pollutantsCorrect
(C)Primary air pollutants – Examples include DDT, ; Secondary air pollutants – Examples include Ozone, PAN
(D)None of these

Answer: (B)

Solution

Secondary pollutants such as ground-level ozone and PAN, formed through atmospheric reactions among primary pollutants, are generally more toxic/harmful than the primary pollutants from which they are derived, not less toxic as stated in (b), making

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Question ID VK-130274