Which of the following is a secondary pollutant?

25 2018 Environmental IssuesAir pollution – primary and secondary pollutants Easy
Which of the following is a secondary pollutant?
A $SO_2$
B $CO_2$
C CO
D $O_3$

Explanation

Ground-level ozone forms from reactions of primary pollutants.

Detailed Solution

$O_3$ (ozone) is a secondary pollutant. Secondary pollutants are formed by the reaction of primary pollutants. CO – quantitative pollutant; $CO_2$ – primary pollutant; $SO_2$ – primary pollutant.

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