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There is no atmosphere on the moon because

(a) it is near to the earth

(b) it receives light from the sun

(c) it revolves around the earth

(d) the escape velocity of gas molecules on it is less than the root mean square velocity here

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(d) the escape velocity of gas molecules on it is less than the root mean square velocity here

The escape velocity on the surface of moon is lesser than the RMS velocity of the molecules of gas at the surface temperature of moon.

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