Which one of the following gases is placed second in respect of abundance in the Earth's atmosphere?

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Question

This question was previously asked in

NDA (Held On: 10 Sept 2017) General Ability Test Previous Year paper

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Answer 1

The correct answer is Oxygen.

Key Points

Oxygen with 20.95% of the earth’s atmosphere, is placed as the second most abundant gas in the atmosphere.
Nitrogen is placed at the top with 78.09% of the earth’s atmosphere.
Third place is Argon with 0.93% of the earth’s atmosphere.
Then comes Carbon Dioxide with 0.04% of the earth’s atmosphere.
Also, a small amount of Helium, Neon, Argon, Krypton, Hydrogen and water vapour.

atmos