JEE Main · 2022 · 24 Jun 2022 · Shift 2 · d and f Block Elements

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

Answer: 3

Solution

Manganese(VI) exists as

MnO X_{4} X^{2 -}

(manganate ion). In acidic solution, it disproportionates:

3 MnO X_{4} X^{2 -} + 4 H X^{+} \to 2 MnO X_{4} X^{-} + MnO X_{2} + 2 H X_{2} O

Oxidation states:

Difference = 7 - 4 = 3

JEE Main · 2022 · 24 Jun 2022 · Shift 2 · Integer answer