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  3. 10th Class
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10th Class Science Sample Paper Science Olympiad Model Test Paper-8

  • question_answer
    The life supporting gases such as \[{{O}_{2}},\] \[{{N}_{2}}\] and  \[C{{O}_{2}}\] are chiefly concentrated in:

    A) Troposphere

    B) Mesosphere

    C) Stratosphere

    D) Exosphere

    E) None of these

    Correct Answer: A

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