Question: The molecule in which hybrid MOs involve only one d-orbital of the central atom is :-
$\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
$\left[\mathrm{CrF}_{6}\right]^{3-}$
$\mathrm{BrF}_{5}$
$\mathrm{XeF}_{4}$
Correct Option: 1
Solution:
$\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
dsp $^{2}$ hybridisation.
