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प्रश्न
Write ‘true’ or ‘false for the following;
The composition of air was discovered by Lavoisier.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Fill in the blanks :
_______ and ______ are the most common air pollutants.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Solution of carbon dioxide in water is called _________ acid.
Write ‘True’ or ‘False’ in front of following statement.
The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.
Give two examples of modern fuels.
Name the following:
The main, rare (inert) gas present in air.
Analogy
Photosynthesis : _____ :: Respiration : Oxygen
______ gas is essential for the proper growth of all plants.
Nitrogen gas is so cold that moisture in the air condenses on it, creating a dense fog.
Mountaineers carry oxygen cylinders with them because ______.
Observe the picture given in figure carefully and answer the following questions.
- What is covering the nose and mouth of the police man?
- Why is he putting a cover on his nose?
- Can you comment on air quality of the place shown in the figure?
