Question

The oxidation number of $Mn$ in the product formed on strongly heating $M{n}_2{O}_7$ is ______.

Answer 1

Answer: 4

$2M{n}_2{O}_7\stackrel{\Delta }{\to }4Mn{O}_2+3O_2$
$\therefore$ Oxidation number of $Mn{O}_2$ is
$\Rightarrow x+2\times (-2)=0$
$\Rightarrow x=+4$