Which of the following is primarily contained in the colored discharge tubes used for advertising?

Which noble gas has the lowest boiling point?

$A$ 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)

The noble gas was first discovered by

Identify the gases used to fill in electric bulbs.

Among the following molecules:
$(i)$ $XeO_3$
$(ii)$ $XeOF_4$
$(iii)$ $XeF_6$
Those having the same number of lone pairs on $Xe$ are: