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प्रश्न
Tick (√) the most appropriate answer.
The presence of water vapour in air is essential for :
विकल्प
health and comfort of animals
rate of evaporation from plants and animals
growth of plants
all the above
उत्तर
all the above
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संबंधित प्रश्न
What do you observe when Calcium is heated and then tested with moist blue and red litmus – paper?
Statement given below is incorrect. Write the correct statement :
During thunder and lightning, nitrogen and oxygen combine to form nitrogen dioxide gas.
Tick (√) the most appropriate answer.
A gas which dilutes the activity of oxygen in air is:
Give two examples of modern fuels.
Name the main component of air.
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
How will you prove that air supports burning?
Nitrogen is essential for burning.
State whether the following statement is true or false. If false, correct them.
Plants consume oxygen for respiration.
Observe the picture given in Fig. carefully and answer the following questions.
Why is he putting a cover on his nose?
