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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
What is air pollution ? What are the harmful effects of sulphur dioxide, nitrogen dioxide and hydrogen sulphide present in the air ?
Fill in the blank :
________ is the most abundant inert gas present in air.
Tick (√) the most appropriate answer.
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Define the following:
Combustion.
Write ‘true’ or ‘false for the following;
The major component of air is oxygen.
Name three different appliances where air is utilized.
Give word equation for the following conversion:
Nitric oxide to nitrogen dioxide
Analogy
Photosynthesis : _____ :: Respiration : Oxygen
Explain carbon dioxide and its uses.
Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain ______.
