Which is the stable crystalline form of sulfur at room temperature?

Choose the $INCORRECT$ statement about $SO_2$.

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.

Which of the following is not correct?

Ozone $(O_3)$ belongs to which group of the periodic table?

The test of ozone $O_3$ can be done by