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प्रश्न
Give the chemical name of rust.
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उत्तर
The chemical name of rust is hydrated iron oxide [Fe2OrxH2O]
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संबंधित प्रश्न
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
_______ gas is used for filling weather observation balloons.
Fill in the blank
Aquatic plants and animals use _________ in water.
Compare respiration and combustion-both involving oxygen of 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 |
How will you show that air is dissolved in water?
The second major component of air is oxygen.
What is not true about air?
Explain the following observations very briefly
An empty glass in fact is not empty.
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Oxygen
