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प्रश्न
______ is the active component of air.
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उत्तर
Oxygen is the active component of air.
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संबंधित प्रश्न
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
Solution of carbon dioxide in water is called _________ acid.
Tick (√) the most appropriate answer.
Symbiotic bacteria is not present in the nodules of :
Define the following:
Combustion.
Give a reason why nitrogen is filled in food packets and not oxygen.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Carbon dioxide, water vapour and energy in the form of heat are evolved during respiration.
Mention one necessary condition for the combustion to take place.
Inhaled air contains a large amount of carbon-di-oxide.
Match the following
| 1. | Moving Air | Photosynthesis |
| 2. | Layer in which we live | Troposphere |
| 3. | Stratosphere | Wind |
| 4. | Oxygen | Ozone layer |
| 5. | carbon-di-oxide | Combustion |
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Nitrogen
