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प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
पर्याय
True
False
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उत्तर
False:
Atmospheric nitrogen cannot be directly absorbed by the plants to form plant proteins.
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संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Fill in the blank:
_____________ discovered the oxygen gas.
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
Draw a neat labelled diagram for the following experiment.
To prove that oxygen is non-combustible, but supports combustion.
Complete the statement given below by filling in the blank with the correct word/s from the word/s given below
____________ is an example of a pollutant present in the air.
List five activities that are possible due to the presence of air.
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
