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प्रश्न
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
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उत्तर
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संबंधित प्रश्न
Name two important processes supported by oxygen present in air.
How is air useful to agriculture?
Name two air pollutants which cause acid rain.
Tick (√) the correct alternative from the choice given for the following statement.
The substance which accelerates the speed of a reaction without itself undergoing any change is called
Give a brief account of the discovery of air and the scientists involved.
The capacity of air to hold moisture depends upon the ______ of the air.
While freezing, the ______ of water is lowered.
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
A firki does not rotate in a closed area.
