2. Sample Papers
  3. SSC
  4. Ecology And Environment

SSC Ecology And Environment Sample Paper NCERT Sample Paper-6

  • question_answer
    Which of the following is a primary pollutant?

    A)  \[CO\]             

    B)  \[HN{{O}_{3}}\]

    C)  \[{{H}_{2}}S{{O}_{4}}\]       

    D)  \[{{O}_{3}}\]

    Correct Answer: A

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