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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
Discuss harmful effects of greenhouse effect.
Give two uses of the following component present in air:
water vapour
Define rusting?
Write ‘true’ or ‘false for the following;
Air is a compound.
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
How is light scattered by the air?
State the meaning of the term Air
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
