Which noble gas has the least tendency to form compounds?

$XeF_6$ on complete hydrolysis gives:

Which element does not react with $F_2$?

The most abundant noble gas in the atmosphere is

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:

List the uses of Neon and argon gases.