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Questions and Answers
What percentage of air is occupied by nitrogen?
What percentage of air is occupied by nitrogen?
- 78% (correct)
- 50%
- 1%
- 21%
Which gas makes up about 21% of the air?
Which gas makes up about 21% of the air?
- Carbon dioxide
- Argon
- Helium
- Oxygen (correct)
Apart from gases, what else is present in the air?
Apart from gases, what else is present in the air?
- Water vapour, smoke, and dust particles (correct)
- Crude oil
- Radioactive elements
- Solid metals
Where is the amount of water vapour present in the air more than in plains?
Where is the amount of water vapour present in the air more than in plains?
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Study Notes
Composition of Air
- Nitrogen occupies about 78% of air.
- Oxygen makes up about 21% of the air.
Other Components of Air
- Apart from gases, air also contains water vapour and other impurities.
- The amount of water vapour present in the air is more in mountains than in plains.
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