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    Question

    Which among the following is considered a

    primary pollutant directly emitted into the atmosphere?
    A Sulfuric acid mist Correct Answer Incorrect Answer
    B Nitric oxide (NO) Correct Answer Incorrect Answer
    C Nitrogen dioxide (NO2) Correct Answer Incorrect Answer
    D Particulate lead Correct Answer Incorrect Answer

    Solution

    Nitrogen dioxide (NO2) is a primary pollutant that is directly emitted into the atmosphere and is formed by the oxidation of nitric oxide (NO).

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