Identify the incorrect statement.

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:

In which pair of ions do both species contain an $S-S$ bond?

White silver surface turns black when $O_3$ is passed over it. This is due to the formation of

The most efficient agent for the absorption of $SO_3$ is

Justify the placement of $O$,$S$,$Se$,$Te$,and $Po$ in the same group of the periodic table in terms of electronic configuration,oxidation state,and hydride formation.