Assertion $(A)$: The boiling points of noble gases increase from $He$ to $Xe$.
Reason $(R)$: The interatomic van der Waals' attractive forces increase from $He$ to $Xe$.
The correct answer is:
Reason $(R)$: The interatomic van der Waals' attractive forces increase from $He$ to $Xe$.
The correct answer is:
- ABoth $(A)$ and $(R)$ are true,and $(R)$ is the correct explanation of $(A)$
- BBoth $(A)$ and $(R)$ are true,and $(R)$ is not the correct explanation of $(A)$
- C$(A)$ is true but $(R)$ is not true
- D$(A)$ is not true but $(R)$ is true
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