$1 \ mole$ of $MnO_4^{2-}$ in neutral aqueous medium disproportionates to:

Assign $A, B, C, D$ from the given type of reaction.
$S_8 + NaOH \longrightarrow Na_2S + Na_2S_2O_3$

From the given reactions, identify the disproportionation reaction:
$(i) \ Cl_{2(g)} + 2KI_{(aq)} \longrightarrow 2KCl_{(aq)} + I_{2(s)}$
$(ii) \ Cl_{2(g)} + 2OH^{-}_{(aq)} \longrightarrow ClO^{-}_{(aq)} + Cl^{-}_{(aq)} + H_2O_{(l)}$
$(iii) \ Mg_{(s)} + 2HCl_{(aq)} \longrightarrow MgCl_{2(aq)} + H_{2(g)}$
$(iv) \ 2H_2O_{2(aq)} \longrightarrow 2H_2O_{(l)} + O_{2(g)}$

The species given below that does $NOT$ show disproportionation reaction is :

Which of the following species do not show disproportionation reaction and why?
$ClO^{-}, ClO_{2}^{-}, ClO_{3}^{-}$ and $ClO_{4}^{-}$
Also write the reaction for each of the species that disproportionates.

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