Which of the following compounds has the maximum number of oxo groups (terminal $O$ atoms bonded to the central atom by a double bond)?

Among the hydrides formed by the group $16$ elements,only $H_2O$ has an abnormally low volatility (high boiling point). This is so because

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

Which among the following reactions exhibits the reducing property of ozone?

Which of the following is $NOT$ a property of ozone $(O_3)$?

Identify the correct statements from the following.
$(i)$ Oxygen shows $-2, -1, +1$ and $+2$ oxidation states.
$(ii)$ The thermal stability of $H_2O, H_2S$ and $H_2Se$ follows the order $H_2O < H_2S < H_2Se$.
$(iii)$ The reducing nature of $H_2S, H_2Se$ and $H_2Te$ follows the order $H_2S < H_2Se < H_2Te$.