Q. A complex compound in which the oxidation number of a metal is zero, is
A) $K_{4}\lbrack Fe(CN)_{6}\rbrack$
B) $K_{3}\lbrack Fe(CN)_{6}\rbrack$
C) $\lbrack Ni(CO)_{4}\rbrack$
D) $\left\lbrack Pt\left( {NH}_{3} \right)_{4} \right\rbrack{Cl}_{2}$
Explanation
(c)
CO is a neutral ligand, so the oxidation state of metal in metal carbonyls is always zero.
$\lbrack Ni(CO)_{4}\rbrack$
x+(0$\times$4)=0
x =0
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.