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)

1,3,4.5

Answer 2

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.