Who among the following first prepared a stable compound of a noble gas?

Monazite is a source of

The structure of $XeOF_4$ is

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

What is the oxidation state of $Xe$ in $XeOF_2$?

Ionisation potential values of noble gases decrease down the group with increase in atomic size. Xenon forms binary fluorides by the direct reaction of elements. Identify the correct statement$(s)$ from below.