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प्रश्न
What is nitrogen-fixation?
उत्तर
Nitrogen fixation : Symbiotic bacteria living in the root nodules of leguminous plants like peas, beans, absorb nitrogen directly from air and convert into nitrates. Thereafter, the plants convert it into proteins. Nitrogen is returned to the soil when plant and animal matter decays. This decomposition work is done by organisms called denitrifying bacteria which reconvert dead organic tissue into its constituent nitrogen.
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
Give reason:
Aquatic animals and plants are able to survive in the matter.
Give a reason why nitrogen is filled in food packets and not oxygen.
Name the following:
The product formed when phosphorus burns in oxygen.
Name the following:
The main, rare (inert) gas present in air.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The percentage of carbon dioxide in the air is between 0.2 to 0.4%.
______ is the active component of air.
What was the old name of nitrogen?
A ______ gas that is used to remove carbon impurities from the steel.
