What is the oxidation state of $Xe$ in $XeOF_4$?

The noble gas was first discovered by

$XeF_2$ and $XeF_6$ are separately hydrolysed,then:

Which one of the following reactions of xenon compounds is not feasible?

The first compound of inert gases was prepared by scientist Neil Bartlett in $1962$. This compound is

The density of nitrogen prepared from air is slightly higher than that of nitrogen prepared from chemical compounds. This is due to the presence of which of the following in nitrogen obtained from air?