What is the color of ozone $(O_3)$?

How is $O_3$ estimated quantitatively?

Which is the correct thermal stability order for $H_2 E$ $(E = O, S, Se, Te, Po)$?

White phosphorus reacts with sulphuryl chloride to form $PCl_5$ and $X$. Chlorine reacts with $X$ in the presence of wood charcoal to form $Y$. $X$ and $Y$ are respectively

Which of the following molecules exhibits the lowest thermal stability?

Assertion : There is a large difference between the melting and boiling points of $O$ and $S$.
Reason : It can be explained on the basis of their atomicity in $O_2$ and $S_8$ molecules.