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Q.
In which of the following pair the EAN of central metal atom is not same ?
Coordination Compounds
Solution:
$EAN = Z - X + Y$
$Z =$ Atomic number of the metal
$X=$ Number of electrons lost during the formation of the metal ion from its atom
$Y=$ Number of electrons donated by the ligands
For $\left[ Ni ( CO )_{4}\right]$
$EAN = Z - X + Y =28-0+8=36$
For $\left[ Ni ( CN )_{4}\right]^{2-}=28-2+8=34$
Thus the EAN of $\left[ Ni ( CO )_{4}\right]$ and $\left[ Ni ( CN )_{4}\right]^{2-}$ is not the same.