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प्रश्न
Name the main components of air.
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उत्तर
The main components of air are
- nitrogen
- oxygen
- carbon dioxide
- water vapour
- inert or noble gases
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संबंधित प्रश्न
Tick (√) the most appropriate answer.
The presence of water vapour in air is essential for :
What do you understand by the term polluted air?
Complete the statement given below by filling in the blank with the correct word from the words given below
The ______ is a layer which extends up to about 10-50 km. above the earth.
Name the following:
The type of bacteria which directly absorb nitrogen from the air and converted soluble nitrates in the soil.
What happens if the percentage of carbon-dioxide increases in the air?
Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
“Air is not an elementary substance, but a composition”. Why?
Metals like magnesium, iron, and sodium burn in oxygen and give basic ______.
Nitrogen is about two times more soluble in water than oxygen.
