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Q.

Which of the following is a secondary pollutant in the troposphere?

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a

SO2

b

Methane

c

CFCs

d

Ozone

answer is C.

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Detailed Solution

Bad ozone in the troposphere is a colorless and highly irritating gas that forms just above the earth's surface. It is called a secondary pollutant because it is produced when two primary pollutants react in sunlight and stagnant air. These two primary pollutants are nitrogen oxides (NOx) and volatile organic compounds (VOCs).

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Which of the following is a secondary pollutant in the troposphere?