Question

The number of unpaired electrons in $Ni(CO{)}_4$ is

• A. 0
• B. 1
• C. 3
• D. 4

Answer 1

Answer: (A)

Oxidation state of $Ni$ in $Ni(CO{)}_4$ is zero.
$\therefore$ no unpaired electrons present in $Ni(CO{)}_4$.