The oxidation states not shown by Mn in given reaction is : $3 \mathrm{MnO}_4^{2-}+4 \mathrm{H}^{+}…
The oxidation states not shown by Mn in given reaction is :
$3 \mathrm{MnO}_4^{2-}+4 \mathrm{H}^{+} \longrightarrow 2 \mathrm{MnO}_4^{-}+\mathrm{MnO}_2+2 \mathrm{H}_2 \mathrm{O}$
A. +6
B. +2
C. +4
D. +7
E. +3
Choose the most appropriate answer from the options given below :
D and E only
B and D only
A and B only
B and E only
Solution
In the following reaction
$3 \mathrm{MnO}_4^{2-}+4 \mathrm{H}^{+} \longrightarrow 2 \mathrm{MnO}_4^{-}+\mathrm{MnO}_2+2 \mathrm{H}_2 \mathrm{O}$
So +2 and +3 oxidation state is not shown by Mn .
