What is the oxidation number of Mn in $\mathrm{MnO}_4^{-}$?

What is the oxidation number of Mn in $\mathrm{MnO}_4^{-}$?
  1. -5
  2. 6
  3. 5
  4. 7

Solution

$\begin{aligned} & x+(-2 \times 4)=-1 \\ & x-8=-1 \\ & x=+7 \end{aligned}$ $\therefore \quad$ Oxidation state of $\mathrm{Mn}=+7$

Asked in: MHT CET 2024 (16 May Shift 2)

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