Sulphur dioxide reacts with chlorine in the presence of charcoal to give

Ozone is obtained from oxygen by:

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

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.

The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of

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