The characteristic oxidation number of atoms in free metals is

In alkaline condition,$KMnO_4$ reacts as $2KMnO_4 + 2KOH \to 2K_2MnO_4 + H_2O + [O]$. The equivalent weight of $KMnO_4$ would be (Atomic mass of $K = 39$,$Mn = 55$,$O = 16$).

The equivalent weight of potassium permanganate in an alkaline medium is........

The oxidation state of sulfur in the anions $SO_3^{2-}$,$S_2O_4^{2-}$,and $S_2O_6^{2-}$ increases in the order:

Which of the following has been arranged in order of increasing oxidation number of nitrogen?

The correct set of oxidation numbers of $N$ in $NH_4NO_2$ is