Question

When $KMnO_4 $acts as an oxidising agent and ultimately forms $MnO^{2-}_4, MnO_2, Mn_2O_3 \, and \, Mn^{2+}$. Then the number of electrons transferred in each case respectively

• A. 4,3,1,5
• B. 1, 5, 3, 7
• C. 1,3,4.5
• D. 3. 5, 7, 1

Answer 1

Answer: (C)

In $KMnO_4$ the O.N. of $Mn$ is $+7$, in $MnO_4^{-2} + 6$, in $MnO_2 + 4$ in $Mn_2O_3 + 3$ and in $Mn^{2+}$ is $+2$. The difference being $1, 3, 4$ and $5$ respectively.