In which of the following compounds,the trans | vedclass

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(B) To determine the oxidation state of the transition metal,we consider the charge of the ligands attached to it.$A$: In $[Fe(H_2O)_3(OH)_3]$,$Fe + 3

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$[Ni(CO)_4]$

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(B) To determine the oxidation state of the transition metal,we consider the charge of the ligands attached to it.$A$: In $[Fe(H_2O)_3(OH)_3]$,$Fe + 3(0) + 3(-1) = 0$,so $Fe = +3$.$B$: In $[Ni(CO)_4]$,$Ni + 4(0) = 0$,so $Ni = 0$. Carbonyl $(CO)$ is a neutral ligand.$C$: In $[Fe(H_2O)_6]SO_4$,$Fe + 6(0) - 2 = 0$,so $Fe = +2$.$D$: In $[Co(NH_3)_6]Cl_3$,$Co + 6(0) - 3 = 0$,so $Co = +3$.Therefore,the transition metal is in the zero oxidation state in $[Ni(CO)_4]$.

In which of the following compounds,the transition metal is in oxidation state of zero?

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