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11 July, 03:52

25. Which of the following is represented in the highest percentage by volume in dry air? A. Carbon dioxide B. Hydrogen C. Nitrogen D. Oxygen

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  1. 11 July, 03:59
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    The correct option is C. Nitrogen gas has the highest percentage by volume of all the gases that make up the air.

    The composition of the air is as follows:

    nitrogen = 78.09%

    Oxygen = 20.95%

    Argon = 0.93%

    Carbon dioxide = 0.04%

    water vapour = traces amount.
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