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प्रश्न
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The percentage of carbon dioxide in the air is between 0.2 to 0.4%.
विकल्प
True
False
उत्तर
This statement is False.
संबंधित प्रश्न
Name three noble gases present in the air. State their one industrial use
Write ‘True’ or ‘False’ in front of following statement.
Enamelling is the process of baking a mixture of silicates on the surface of aluminium at a high temperature.
Fill in the blank
The reddish-brown powder on the surface of iron nails exposed to air and moisture is called _____.
Explain the importance of nitrogen of the air for plant growth.
State the utility of oxygen for respiration in living organisms
Name the following:
A process which removes carbon dioxide from the air.
List out the uses of carbon dioxide.
Whales come up to the water surface to breathe in oxygen.
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.
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere
nitrogen
