All the elements of the oxygen family are

Which among the following is $NOT$ the use of $SO_2$ gas?

Among the following allotropic forms of sulphur,the number of allotropic forms,which will show paramagnetism is ..... .
$(A)$ $\alpha$-sulphur
$(B)$ $\beta$-sulphur
$(C)$ $S_2$-form

The triatomic species of elemental oxygen is known as

Why is a Tyndall box used in the manufacture of sulfuric acid by the contact process?

Peroxodisulphuric acid $(H_2S_2O_8)$ contains which of the following bonds?