GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which element makes up the majority of Earth’s atmosphere?
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Oxygen
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Nitrogen
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Hydrogen
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Carbon
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Explanation:
Detailed explanation-1: -Gases. The most abundant naturally occurring gas is nitrogen (N2), which makes up about 78% of air. Oxygen (O2) is the second most abundant gas at about 21%.
Detailed explanation-2: -Nitrogen is more in the air because it is least reactive and nitrogen is generated and maintained in this natural equilibrium by plants and surface soil bacteria, who convert it to ammonium, nitrites, and nitrates before releasing it as free nitrogen back into the atmosphere.
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