Which of the following compounds undergoes hydrolysis easily?

Photoconductors in xerox machines use which of the following?

In the preparation of sulphuric acid from sulphur dioxide in the lead chamber process,what substance is used as a catalyst?

Which one is known as oil of vitriol?

Ozone turns tetramethyl base paper to which color?

$A$ 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: