Question

The complex compound in which metal is not present in zero oxidation state?

• A. ${Mn}_2{\left(CO\right)}_{10}$
• B. $\left[Ni{\left(CO\right)}_4\right]$
• C. $\left[Cr{\left(C_6{H}_6\right)}_2\right]$
• D. $K\left[{PtCl}_3\left(C_2{H}_4\right)\right]$

Answer 1

The correct option is D $K\left[{PtCl}_3\left(C_2{H}_4\right)\right]$

$A.$ $M{n}_2{\left(CO\right)}_{10}⟹2x+(10\times 0)=0⟹x=0,$ ($x=$oxidation state of metal.)

$B.$ $\left[Ni{\left(CO\right)}_4\right]⟹x+(4\times 0)=0⟹x=0,$ ($x=$oxidation state of metal.)

$C.$ $\left[Cr{\left(C_6{H}_6\right)}_2\right]⟹x+(2\times 0)=0⟹x=0,$ ($x=$oxidation state of metal.)

$D.$ $K\left[PtC{l}_3\left(C_2{H}_4\right)\right]⟹+1+x+3\times (-1)+0=0⟹x=+2,$ ($x=$oxidation state of metal.)

$\therefore$ $Pt$ is in $+2$ Oxidation state.

$\therefore$ Option $D.$ is the correct answer.