Question

The oxidation state of Mn in $K_{2}Mn{O}_4$ is:

• A. 5
• B. 4
• C. 7
• D. 6

Answer 1

The correct option is D 6

let oxidation state of Mn be $x$.

As we know, the oxidation state of O is -2 and that of H is +1.

$K_{2}Mn{O}_4:2+x+(-8)=0$

$\Rightarrow x=8-2$

$\Rightarrow x=+6$.