Which of the following noble gases is most soluble in water?

What are the products formed in the reaction of $XeF_6$ with $SiO_2$?

Which noble gas is most abundant in the atmosphere?

Explain the variations in the following properties of group $18$ elements:
$(i)$ Atomic radii
$(ii)$ Ionisation enthalpy
$(iii)$ Electron gain enthalpy

The solubility of noble gases in water is fairly high due to

Clathrates are defined as ......