Question

    Exhaled air

    contains-
    A Hydrogen Correct Answer Incorrect Answer
    B Helium Correct Answer Incorrect Answer
    C water vapor Correct Answer Incorrect Answer
    D Nitrogen Correct Answer Incorrect Answer

    Solution

    Water is formed when sugar (food) is broken by oxygen in respiration (along with carbon dioxide). As a result, exhaled air has significantly more water vapour than inhaled air.

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