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प्रश्न
Answer in your own words.
What are the various constituents of air? Write their uses.
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उत्तर
| Constituents of air | Uses |
| 1. Nitrogen | Required in building proteins. Useful in the production of ammonia. Used in airtight packaging of food products. |
| 2. Oxygen | Necessary for respiration and combustion. |
| 3. Carbon dioxide | Used by plants to make their food. Used in fire extinguishers. |
| 4. Argon | Used in electric bulbs. |
| 5. Helium |
Used for obtaining low temperatures. |
| 6. Neon | Used in decorative lights and street lighting. |
| 7. Krypton | Used in fluorescent tubes. |
| 8. Xenon | Used in flash photography. |
संबंधित प्रश्न
What was the ancient belief regarding the nature of matter ?
Fill in the blank:
_____________ discovered the oxygen gas.
What is wind?
Name two important processes supported by oxygen present in air.
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
State four steps to be taken to control air pollution.
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
Do sailors need the help of wind to sail?
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Air is a ______ of some gases.
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
