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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
Name three noble gases present in the air. State their one industrial use
Give two examples of modern fuels.
Explain the importance of nitrogen of the air for plant growth.
Complete the statement given below by filling in the blank with the correct word from the words given below
The ______ is a layer which extends up to about 10-50 km. above the earth.
Name the following:
An inert gas which has a low boiling point and is used for producing very low temperatures
How do the roots of land plants get oxygen for breathing?
Aerated water contains
______ is used as a substitute for compressed air in tyres.
Match the following
| 1. | Oxygen | a. | Carbon dioxide |
| 2. | Azote | b. | Nitrogen |
| 3. | Solvay process | c. | Vital life |
| 4. | Gun powder | d. | No life |
Observe the picture given in Fig. carefully and answer the following questions.
Can you comment on the air quality of the place shown in Fig?
