Coordination Compounds - Result Question 45
####51. Which is diamagnetic? [NEET Kar. 2013]
(a) $[Fe(CN)_6]^{3-}$
(b) $[Co(F_6)]^{3-}$
(c) $[Ni(CN)_4]^{2-}$
(d) $[NiCl_4]^{2-}$
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Solution:
- (c) $Ni^{+2} \to 3 d^{8}=$\begin{tabular}{|l|l|l|l|l|} \hline 1L & 1L & $1 l$ & 1 & 1 \end{tabular}
$CN^{-}$is a strong ligand and causes pairing of $3 d$ electrons of $Ni^{2+}$.
$\therefore$ It is diamagnetic.
