alleryIn [Ni(CO)₄], the oxidation state of Ni is:
A−2
B0 — CO is a neutral ligand and the complex is neutral
C+4
D+2
Answer & Solution
Correct answer: B. 0 — CO is a neutral ligand and the complex is neutral
**Ni(CO)₄** is a neutral complex (no counter ion).
CO is a **neutral ligand**.
So Ni oxidation state = **0**.
(Tetrahedral geometry, sp³ hybridised, diamagnetic.)
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