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SSC Ecology And Environment Sample Paper NCERT Sample Paper-4

  • question_answer
    The \[C{{O}_{2}}\] content by volume m the atmospheric air is about

    A)  0-032%

    B)  0.32%

    C)  3.23% 

    D)  4%

    Correct Answer: A

    Solution :

    [a] Air consists of about 78% nitrogen, 21% oxygen, 0.93% argon and 0.032% carbon dioxide by volume. It also contains a little amount of gases like neon, helium, krypton, hydrogen, ozone, carbon monoxide, sulphur dioxide etc.


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