The formula of ozone is $O_3$,it is

$A$ sulphate of a metal $(A)$ on heating evolves two gases $(B)$ and $(C)$ and an oxide $(D).$ Gas $(B)$ turns $K_2Cr_2O_7$ paper green while gas $(C)$ forms a trimer in which there is no $S-S$ bond. Compound $(D)$ with $HCl$ reacts to form a compound $(E)$ which exists as a dimer. Compounds $(A)$,$(B)$,$(C)$,$(D)$ and $(E)$ are respectively:

The acid in which $O-O$ bonding is present is

Anomalous behaviour of oxygen is due to its

Which of the following statements is incorrect for sulfur?

Chalcogen group elements are: