Question

The oxidation states of $Mn$ in $MnS{O}_4,Mn{O}_2$ $K_{2}Mn{O}_4$ and $KMn{O}_4$ are respectively

• A. 1, 2, 4, 4
• B. 2, 4, 6, 7
• C. 1, 2, 4, 6
• D. 2, 4, 7, 6

Answer 1

Answer: (B)

: $MnS{O}_4:+x-2=0\Rightarrow x=+2.$ $Mn{O}_2:x+2(-2)\Rightarrow x-4=0\Rightarrow x=+4$ $K_{2}Mn{O}_4:(+1)\times 2+x+(-2)\times 4$ $\Rightarrow$ $+2+x-8\Rightarrow x=+6.$