Which of the following noble gases has the lowest polarizability?

Identify the type of interaction between $Xe$ and water molecules in the clathrate compound of $Xe$ with water.

Which of the following xenon fluorides is impossible?

$A$ gas $X$ is used in filling balloons for meteorological observations. It is also used in gas-cooled nuclear reactors. Here,the gas $X$ is

$XeF_6$ on partial hydrolysis gives '$X$' and $HF$. The shape of '$X$' is

Which of the following has zero valency?