Which among the following species does not exhibit disproportionation reaction?

Step-by-step solution

A disproportionation reaction occurs when an element in an intermediate oxidation state is simultaneously oxidized and reduced. For a species to undergo disproportionation, the central atom must be in an oxidation state that is neither its maximum nor its minimum possible oxidation state. Calculate the oxidation state of Bromine (Br) in each species: In BrO ₄⁻ , let the oxidation state of Br be x . Then x + 4(-2) = -1 , which gives x = +7 . The maximum oxidation state of Bromine is +7 (group 17). Since it is alread