Which element out of $He$,$Ar$,$Kr$,and $Xe$ forms the least number of compounds?

$A$ xenon compound '$A$' upon partial hydrolysis gives $XeO_{2}F_{2}$. The number of lone pairs of electrons present in compound $A$ is ....... . (Round off to the nearest integer)

Which of the following compounds of Xenon has a pyramidal geometry?

Xenon hexafluoride on partial hydrolysis produces compounds $X$ and $Y$. Compounds $X$ and $Y$ and the oxidation state of $Xe$ are respectively

Which one of the following noble gases is not found in the atmosphere?

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?