Which one of the following does not get oxidi | vedclass

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(C) Bromine water acts as an oxidising agent with a standard reduction potential of $E^{\circ} = +1.09 \ V$.For a species to be oxidised by bromine wa

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$Mn^{2+}$ to $MnO_4^{-}$

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(C) Bromine water acts as an oxidising agent with a standard reduction potential of $E^{\circ} = +1.09 \ V$.For a species to be oxidised by bromine water,the standard oxidation potential of the species must be lower than the reduction potential of bromine,or the standard reduction potential of the species must be less than $+1.09 \ V$.$1$. $Fe^{2+} \rightarrow Fe^{3+} + e^-$,$E^{\circ}_{ox} = -0.77 \ V$ (Oxidised by $Br_2$)$2$. $Cu^{+} \rightarrow Cu^{2+} + e^-$,$E^{\circ}_{ox} = -0.15 \ V$ (Oxidised by $Br_2$)$3$. $Sn^{2+} \rightarrow Sn^{4+} + 2e^-$,$E^{\circ}_{ox} = -0.15 \ V$ (Oxidised by $Br_2$)$4$. $Mn^{2+} \rightarrow MnO_4^-$,$E^{\circ}_{ox} = -1.51 \ V$. Since the oxidation potential is much more negative than the reduction potential of bromine,$Mn^{2+}$ cannot be oxidised to $MnO_4^-$ by bromine water.

Which one of the following does not get oxidised by bromine water?

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