The colored discharge tubes used for advertising mainly contain .........

$XeF_6$ dissolves in anhydrous $HF$ to give a good conducting solution which contains:

What is the correct order of occurrence (\% by weight) in air of $Ne, Ar$ and $Kr$?

Identify the inert gas used for filling balloons.

Which noble gas is most soluble in water?

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