Which of the following compounds contains an $S - S$ bond?

Among Group $16$ elements,which one does $NOT$ show $-2$ oxidation state?

Consider the following sulphur-based oxoacids: $H_2SO_3$,$H_2SO_4$,$H_2S_2O_8$,and $H_2S_2O_7$. Among these oxoacids,the number of those with a peroxo $(O-O)$ bond is $..........$

Among the hydrides of group $16$ elements, the hydride $X$ has the lowest boiling point and the hydride $Y$ has the highest boiling point. $X$ and $Y$ respectively are:

Which of the following has an $S-S$ bond?

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