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Q.

There is no atmosphere on moon as


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a

It is closer to the earth

b

It revolves around the earth

c

It gets light from the SUN

d

The gases have less requirement of velocity or energy to escape from its surface 

answer is D.

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Detailed Solution

There is no atmosphere on the moon as the gases have less requirement of velocity or energy to escape from its surface.
The escape velocity at the surface of the moon is less than the RMS velocity of the molecules of gas at the surface temperature of the moon. Consequently, the gas molecules escape, and hence, the moon cannot keep an atmosphere.
 
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