What is oxidation state of $\mathrm{Mn}$ in $\mathrm{MnO}_4^{-1}$ ?

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

Solution

Let O.S. of $\mathrm{Mn}$ is $\mathrm{x}$ $\therefore \mathrm{x}+4(-2)=-1$ $x=+7$

Asked in: MHT CET 2022 (06 Aug Shift 1)

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