BiologyAir is a mixture of various gases. One of the gases is 21% part of the air and is essential for the survival of human beings. This gas is :

Air is a mixture of various gases. One of the gases is 21% part of the air and is essential for the survival of human beings. This gas is :

  1. A

    Nitrogen

  2. B

    Oxygen

  3. C

    Ozone

  4. D

    Argon

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    Solution:

    The Correct Answer is Option B i.e. Oxygen
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