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

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  1. Oxygen
  2. Hydrogen
  3. Nitrogen
  4. Carbon dioxide

Answer (Detailed Solution Below)

Option 1 : Oxygen
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Detailed Solution

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The correct answer is Oxygen.

  • Oxygen is placed second in respect of abundance in the Earth's atmosphere.

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.

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