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प्रश्न
How do astronauts breathe when they go beyond the earth’s atmosphere?
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उत्तर
It is because nitrogen tires hold pressure longer as compared to compressed air. Nitrogen gas in the tire escapes more slowly than compressed air does.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Explain the importance of nitrogen of the air for plant growth.
Give word equation for the following conversion:
Nitric oxide to nitrogen dioxide
Air is made up of oxygen only.
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
Explain carbon dioxide and its uses.
Air contains a small amount of CO2, Water vapour, and some other gases like ______, etc.
______ is used as a substitute for compressed air in tyres.
The solid form of CO2 is called dry ice which undergoes condensation.
Explain the following observations very briefly
An empty glass in fact is not empty.
