In Ni(CO)4 what is the oxidation number of Ni?

Answer:

Ni(CO)₄ – Tetra carbonylnickel.

CO – Neutral ligand

Oxidation state of CO – 0

Let’s calculate the oxidation state of nitrogen in Ni(CO)₄;

x + ( 4 0 ) = 0

x = 0

Therefore, the oxidation state of “Ni” in Ni(CO)₄ will be zero.