Manganese $(VI)$ has the ability to disproportionate in an acidic solution. The difference in oxidation states of the two ions it forms in an acidic solution is $...... .$

The disproportionation of $MnO_{4}^{2-}$ in acidic medium results in the formation of two manganese compounds $A$ and $B$. If the oxidation state of $Mn$ in $B$ is smaller than that of $A$,then the spin-only magnetic moment $(\mu)$ value of $B$ in $BM$ is $.........$ (Nearest integer).

What is meant by 'disproportionation' of an oxidation state? Give an example.

Which of the following reactions is not a disproportionation reaction?

Which species among the following does not show disproportionation reactions?

Which of the following best describes the behavior of bromine in the reaction given below?
$H_2O + Br_2 \to HOBr + HBr$