Air Around Us

Arrange the following gases in ascending order of their percentages in the air.
A. Oxygen < Nitrogen < Hydrogen
B. Nitrogen < Hydrogen < Oxygen
C. Nitrogen < Oxygen < Hydrogen
D. Hydrogen < Oxygen < Nitrogen

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Answer: Option D
: D

The correct ascending order of percentages of the gases as per the composition of air is: hydrogen and other gases - 1%, oxygen - 21% and nitrogen - 78%.

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