The disproportionation of...|EQUIVALENT CONCEPT|JEEMAIN 2026

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JEE MAIN 2022

28-07-2022 S1

Question

The disproportionation of $\mathrm{MnO}_4^{2-}$ in acidic medium resulted 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 $B M$ is $\_\_\_\_$ . (Nearest integer)

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Solution

MnO₄²⁻ ⟶(H⁺) MnO₄⁻ + MnO₂ No. of unpaired e⁻ = 3 ∴ μ = √15 = 3.87 Nearest Integer = 4

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