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Which is the second most abundant gas in Earth's atmosphere?1. Hydrogen2. Oxygen3. Nitrogen4. Carbon di oxide

Answer» Correct Answer - Option 2 : Oxygen

The correct answer is Oxygen.

  • Oxygen is the second most abundant gas in Earth's atmosphere.
  • The air in Earth’s atmosphere is made up of approximately 21% oxygen.
  • Oxygen will be almost in negligible quantity at a height of 120 km.
  • Oxygen is the most abundant element on Earth's crust.
  • The atmosphere is composed of gases, water vapour, and dust particles.

 

  • Nitrogen is the most abundant gas in Earth's atmosphere.
  • The composition of gases in Earth's atmosphere:
    • Nitrogen(78.08%)
    • Oxygen(20.95%)
    • Argon(0.93%)
    • Carbon dioxide(0.036%).
  • Code to remember the composition of gases in Earth's atmosphere is NO AC(Nitrogen, Oxygen, Argon, Carbon dioxide).
  • Hydrogen is the most abundant element in the universe.


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