Given below are two statements: one is labelled as Assertion A an… - Vidyadip

MCQ

Given below are two statements: one is labelled as

Assertion $A$ and the other is labelled as Reason $R$.

Assertion $A :$ Earth has atmosphere whereas moon doesn't have any atmosphere.

Reason $R$ : The escape velocity on moon is very small as compared to that on earth.

In the light of the above statement, choose the correct answer from the options given below :

A
$A$ is true but $R$ is false
B
$A$ is false but $R$ is true
C
Both $A$ and $R$ are correct but $R$ is $NOT$ the correct explanation of $A$
✓
Both $A$ and $R$ are correct and $R$ is correct explanation of $A$

✓

Answer

Correct option: D.

Both $A$ and $R$ are correct and $R$ is correct explanation of $A$

d
At Moon, due to low escape velocity, the rms velocity of molecules is greater than escape velocity. Hence molecules escape and there is no atmosphere at Moon.

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