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On any planet, the presence of atmosphere implies (`C_(rms)=` root mean square velocity of molecules and `v_(s)=` escape velocity)

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On any planet, the presence of atmosphere implies (`C_(rms)=` root mean square velocity of molecules and `v_(s)=` escape velocity)
A. `C_(rms)lt V_(e)`
B. `C_(rms)gt V_(e)`
C. `C_(rms)=V_(e)`
D. `C_(rms)=0`
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Correct Answer - A
If `C_("rms")ge V_(e)`, all the moleculoes will escape in space and there will be no atmosphere on the planet.
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