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

SSC Ecology And Environment Sample Paper NCERT Sample Paper-5

  • question_answer
    Which of the following is a secondary pollutant?

    A)  \[S{{O}_{2}}\]            

    B)  \[CO\]

    C)  \[{{O}_{3}}\]              

    D)  \[N{{O}_{2}}\]

    Correct Answer: C

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