The correct order of enthalpy of vaporisation of noble gases is

The correct order of solubility in water for $He, Ne, Ar, Kr, Xe$ is

Which factor is most responsible for the increase in boiling points of noble gases from $He$ to $Xe$?

Assertion $(A)$: Noble gases have very low boiling points.
Reason $(R)$: All noble gases have general electronic configuration of $ns^2 np^6$ (except $He$).

$Xe_{(g)}$ and $F_{2(g)}$ react in the ratio $1:20$ at $573 \ K$ and $60-70 \ bar$ to form $A$. When $A$ is completely hydrolyzed,$B$ and $HF$ are formed. $A$ and $B$ are respectively:

Which of the following compounds has a square pyramidal structure?