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Discussion :: Environmental Science

  1. Which of the following is a secondary pollutant

    2. A.

     CO2
    B.

     CO
    C.

     O3
    D.

     SO2

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    Answer : Option C

    Explanation :

    Secondary pollutants are not emitted directly. They are formed from the combination of primary pollutants with some other compound. Examples of secondary pollutants are Ozone, Formaldehyde, PAN (peroxy acetyl nitrate) and Smog etc.

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