A

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Q. Which is the second most abundant gas in Earth's atmosphere ?

  • (A) Oxygen
  • (B) Nitrogen
  • (C) Hydrogen
  • (D) Carbon dioxide
  • Correct Answer - Option(A)
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  • Filed under category Geography
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Explanation by: Admin
The most abundant naturally occurring gas is Nitrogen which makes up about 78% of air. Oxygen is the second most abundant gas at about 21%.

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