Identify all the products formed when $XeF_4$ is completely hydrolysed.

What is the state of hybridisation of $Xe$ in the cationic part of solid $XeF_6$?

$XeF_6$ on complete hydrolysis gives:

Which one of the following statements regarding helium is not correct?

Complete hydrolysis of $XeF_4$ and $XeF_6$ gives its oxides $P$ and $Q$, respectively. Identify $P$ and $Q$.

Assertion $(A)$: Helium has the lowest boiling point $(4.2 \ K)$.
Reason $(R)$: The forces that exist between helium atoms are weak dispersion forces.