The catalyst used in the contact process is

Oxygen is more electronegative than sulphur,yet $H_2S$ is acidic in nature while $H_2O$ is neutral. This is because:

Point out in which of the following properties oxygen differs from the rest of the members of its family (Group-$16$)

What is the correct order of the first electron gain enthalpy for $O, S,$ and $Se$?

Which of the following statements is $NOT$ correct about ozone?

$A$ 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: