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प्रश्न
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
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उत्तर
Plants convert nitrogen into protein. It is an important constituent of proteins, which are necessary for the growth of animals, plants and human beings. Plants convert nitrogen into proteins.
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संबंधित प्रश्न
Briefly state the importance of Oxygen.
Classify Calcium oxide. Also give a balanced equation to prepare it.
With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.
State the utility of oxygen for respiration in living organisms
Match the statements in List 1 with the correct answers in List 2
| List 1 | List 2 | ||
| 1 | An impurity in air | A | Water vapour |
| 2 | The component of air which supports combustion | B | Respiration |
| 3 | The inert component in the air slightly soluble in water | C | Rare gases |
| 4 | The component of air which minimizes the rate of evaporation | D | Sulphur dioxide |
| 5 | The process which involves oxidation of food substance in living organisms | E | Helium |
| 6 | The component of air which finds application in observation balloons | F | Carbon dioxide |
| 7 | The process which involves oxidation of substances, liberating heat and light energy | G | Combustion |
| 8 | The component of air which is heavier than air and fairly soluble in water | H | Nitrogen |
| 9 | The process by which atmospheric carbon dioxide is absorbed by plants resulting in the formation of carbohydrates | I | Photosynthesis |
| 10 | The component of air which is lighter than air and less than 1% in air | J | Oxygen |
Complete the statement given below by filling in the blank with the correct word from the words given:
The product formed which is common to both combustion and respiration is ______.
Give word equation for the following conversion:
Nitrogen dioxide to nitric acid
During respiration, carbon-di-oxide is exhaled out of the body through the ______.
The amount of water vapour in the air is more in windy places than in other areas.
Observe the picture given in Fig. carefully and answer the following questions.
Why is he putting a cover on his nose?
