Question

Number of electrons transfer in each case when $KMn{O}_4$ acts as an oxidising agent to given:

$Mn{O}_2,{Mn}^{2+},Mn{\left(OH\right)}_3$ and $Mn{O}_4^{2-}$ are respectively:

• A. $3,5,4$ and $1$
• B. $4,3,1$ and $5$
• C. $1,3,4$ and $5$
• D. $5,4,3$ and $1$

Answer 1

The correct option is A $3,5,4$ and $1$

Oxidation state of Mn in $KMn{O}_4$ is +7 .

$Mn{O}_2$ is +4 electron transfer are 3.

${Mn}^{2+}$ is +2 electron transfer are 5.

$Mn{\left(OH\right)}_3$ is +3 electron transfer are 4.

$Mn{O}_4^{2-}$ is +6 electron transfer are 1.