A) 34
B) 35
C) 32
D) 36
Correct Answer: D
Solution :
Key Idea: EAN = Ac. no. of central metal atom oxidation state of central metal atom + electrons gained from ligands Atomic no. of Ni = 28 Oxidation state of Ni in \[[Ni{{(CO)}_{4}}]=0\] (\[\because \] Oxidation state of metal in carbonyl is zero) Electrons gained from ligands \[=2\times 4=8\] (\[\because \] One ligand donates two electrons to metal atom.) \[\therefore \] \[EAN=28-0+8=36\]
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