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| 1. |
Ligher gases like H_(2), He etc. are rate in the atmosphere of Earth. Why ? |
| Answer» Solution :It is so because the `rms` velocity of lighter GASSES like `H_(2)`, ETC. is greater than the escape velocity at the Earth's surface. DUE to it, the lighter gases have escaped from the Earth's surface and their PRESENCE is air the atmosphere of Earth. | |