Which of the following compounds does not liberate oxygen gas on warming with concentrated $H_2SO_4$?

Given below are two statements:
Statement $I$: The boiling point of hydrides of Group $16$ elements follows the order
$H_2O > H_2Te > H_2Se > H_2S$.
Statement $II$: On the basis of molecular mass,$H_2O$ is expected to have a lower boiling point than the other members of the group,but due to the presence of extensive $H$-bonding in $H_2O$,it has a higher boiling point.
In the light of the above statements,choose the correct answer from the options given below:

Identify the incorrect statement regarding ozone $(O_3)$.

Which of the following is a colourless gas that exhibits both oxidising and reducing properties?

When $SO_2$ is passed through a solution of $H_2S$ in water :-

Mention three areas in which $H_2SO_4$ plays an important role.