Question

In which substance does manganese have the highest oxidation number?

• A. $LiMn{O}_4$
• B. $K_{2}Mn{O}_4$
• C. $Mn{O}_2$
• D. $Mn(N{O}_3{)}_2$

Answer 1

The correct option is A $LiMn{O}_4$

In $LiMn{O}_4+1+x+4(-2)=0,x-7=0,x=7.$ $K_{2}Mn{O}_{4}2\left(1\right)+x+4(-2)=0,x-6=0,x=6.$ $Mn{O}_{2}x+2(-2)=0,x+4.$ $Mn{\left(N{O}_3\right)}_{2}x+2(-1)=0,x=2.$

Out of $4$, Manganese in $LiMn{O}_4$ has the highest oxidation number.