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Manipal Medical Manipal Medical Solved Paper-2000

  • question_answer
    The number of moles of oxygen present in one litre of air under standard conditions (it contains 21% oxygen) is:

    A)  0.246 mole

    B)  0.07438 mole

    C)  2.0078 mole

    D)  0.0093 mole

    Correct Answer: D

    Solution :

     Air contains 21% of oxygen \[\therefore \]volume of oxygen\[=\frac{21}{100}=\]0.21 litre \[\therefore \]Number of moles of oxygen present in 0.21 litre at NTP\[=\frac{0.21}{22.4}=0.0093\]


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