Chemistry - Complete d-block Question with Solution | TestHub

$\mathrm{F}{\mathrm{e}}^0+5\mathrm{C}\mathrm{O}\to \left[\mathrm{F}{\mathrm{e}}^0\right(\mathrm{C}\mathrm{O}{)}_5]$
As no change in the oxidation state of iron occurs so it is not an oxidation reaction.
In rest other iron gets oxidised, for example
$\stackrel{0}{\mathrm{F}\mathrm{e}}+\mathrm{C}\mathrm{u}\mathrm{S}{\mathrm{O}}_4\to \stackrel{2+}{\mathrm{F}\mathrm{e}}\mathrm{S}{\mathrm{O}}_4+\mathrm{C}\mathrm{u}$