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प्रश्न
Write down the composition of air.
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उत्तर
Air is composed of the following gases:
| Component | Percentage of volume |
| 1. Nitrogen (N2) | 78.09 |
| 2. Oxygen (O2) | 20.93 |
| 3. Argon (A) | 0.93 |
| 4. Carbon dioxide (CO2) | 0.03 |
| 5. Miscellaneous (moisture, dust, etc.) | 0.02 |
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