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प्रश्न
Answer in your own words.
What are the various constituents of air? Write their uses.
थोडक्यात उत्तर
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 foods. Used in fire extinguishers. |
| 4. Argon | Used in electric bulbs. |
| 5. Heluim |
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. |
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