Science, asked by Sneha1122, 11 months ago

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

Oxygen
Hydrogen
Nitrogen
Carbon dioxide

Answers

Answered by vimalviren25

Answer:

O2 - 21%

Explanation:

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Answered by Anonymous

Answer:

The correct option is A

Explanation:

♦ Earth is the only planet in the solar system with an atmosphere that can sustain life. Earth's atmosphere is divided into five main layers: the exosphere, the thermosphere, the mesosphere, the stratosphere and the troposphere.

♦ The Earth's atmosphere contains 78% Nitrogen, 21% Oxygen, 0.9% argon, 0.04% Carbon dioxide and remaining trace amounts of neon, helium, methane, krypton and hydrogen, as well as water vapor.

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