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Q. Match List I with List II
List I (Complexes) List II (Hybridisation)
A $ [Ni(CO)_4]$ I $sp^{3}$
B $ [Cu(NH_{3})_{4}]^{2+} $ II $dsp ^{2} $
C $ [Fe(NH_{3})_{6}]^{2+} $ III $ sp^{3}d^2 $
D $ [Fe(H_{2}O)_{6}]^{2+} $ IV $d^{2}sp^{3} $

JEE MainJEE Main 2023Coordination Compounds

Solution:

For $\left[ Fe \left( NH _3\right)_6\right]^{+2}, \Delta_0< P$, hence the pairing of electrons does not occur in $t _{2 g }$. Therefore complex is outer orbital and its hybridisation is $sp ^3 d ^2$.
Match List I with List II
List I (Complexes) List II (Hybridisation)
$ [Ni(CO)_4]$ $sp^{3}$
$ [Cu(NH_{3})_{4}]^{2+} $ $dsp ^{2} $
$ [Fe(NH_{3})_{6}]^{2+} $ $ sp^{3}d^2 $
$ [Fe(H_{2}O)_{6}]^{2+} $ $sp^{3} d^2$