Which of the following is a primary pollutant?

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PAN

Aldehydes

$H_{2} S O_{4}$

answer is A.

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Detailed Solution

A primary pollutant is an air pollutant emitted directly from a source. Examples of primary pollutants include monoxide of carbon (CO), oxides of nitrogen and sulfur, volatile organic compounds, and particulate matter. Primary pollutants further react in the presence of sunlight to form secondary pollutants such as ozone. Thus, CO is a primary pollutant.

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