Which of the following species do not show disproportionation?\

Question

Professor PC Thomas Classes · Answer

In $\mathrm{ClO}_{4}^{-}$, the oxidation number of Cl is +7 , which is its maximum value. An element in its highest oxidation state can behave only as an oxidising agent. In other options the oxidation number of Cl is in between +7 and -1\