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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
पर्याय
only oxygen
only nitrogen
only carbon dioxide
all of these
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उत्तर
all of these
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
Write the chemical name of Lime water
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Give two uses of the following component present in air:
water vapour
Mention five causes of air pollution.
The capacity of air to hold moisture depends upon the ______ of the air.
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
The process of conversion of iron into hydrated form of oxides is called _______.
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% |
