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Atmosphare

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  1. Which of the following statement is / are correct
    1. The main gases within the Earth's exosphere are the ligthest gases, mainly hydrogen, with some helium, carbon dioxide, and atomic oxygen near the the exobase
    2. The exosphere is the last layer before space
    3. Since there is no clear boundary with space and the exosphere, the exosphere is sometimes used synonymously with outer space.
    4. All of the above
Correct Option: D

NA


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