Arrange the following gases in ascending order of their percentages in the air.

Oxygen < Nitrogen < Hydrogen

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Nitrogen < Hydrogen < Oxygen

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Nitrogen < Oxygen < Hydrogen

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Hydrogen < Oxygen < Nitrogen

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Solution

The correct option is D Hydrogen < Oxygen < Nitrogen
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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