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5th Class Science Weather, Air and Water Question Bank Air, Water and Weather

  • question_answer
    The table shows the percentages of gases x, y and z.
    X Y Z
    0.03% 21% 78%
    What change would you expect if exhaled air was tested?
    (i) The percentage of gas x will increase.
    (ii) The percentage of gas y will remain unchanged.
    (iii) The percentage of gas z will remain unchanged. 
                   

    A)  only (i) and (ii)

    B)                         only (i) and (iii)

    C)                         only (ii) and (iii)

    D)                         (i), (ii) and (iii)

    Correct Answer: B

    Solution :

    Exhaled air shows an increase in percentage of carbon dioxide and the percentage of nitrogen remains the same.


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