There is no atomosphere on moon because

Options

A. it is close to the earth
B. its surface temperature is `-10^(@)C`
C. the escape velocity of gas molecules is less than their rms velocity on the moon
D. the escape velocity of the gas molecules is more than their rms velocity on the moon

Answer

C

Explanation

There is no atmosphere on the moon because the escape velocity of the gas molecules is less than their rms velocity on the moon.
[if `v_("rms")gt v_(e)`, the gas molecules will escape.]