Question

In the preparation of $KMn{O}_4$, pyrolusite $\left(Mn{O}_2\right)$ is first converted to potassium manganate $\left(K_{2}Mn{O}_4\right)$. In this conversion, the oxidation state of manganese changes from

• A. +1 to +3
• B. +2 to +4
• C. +3 to +5
• D. +4 to +6

Answer 1

The correct option is D +4 to +6

Oxidation state of Mn in $\left(Mn{O}_2\right)$ is +4 and Oxidation state of Mn in $\left(K_{2}Mn{O}_4\right)$ is +6.