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When exhaled air is compared with inhale...

When exhaled air is compared with inhaled air, is there any difference in composition ?

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Exhaled air contains Oxygen 16%, `CO_2` 4%, Nitrogen -79%,. Difference is Oxygen -5% less, `CO_2` -3.46% more, Nitrogen -equal.
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Knowledge Check

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    A
    mixture
    B
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    C
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    D
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    A
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    B
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    C
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    D
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