Single Choice

The hybridization involved in complex $$[Ni(CN)_4]^{2-}$$ is: [Atomic number of Ni $$=28]$$

A$$d^2sp^2$$
B$$d^2sp^3$$
C$$dsp^2$$
Correct Answer
D$$sp^3$$

Solution

$$\displaystyle [Ni(CN)_4]^{2-} $$ is an square planar complex with $$\displaystyle dsp^2 $$ hybridization.

The outer electronic configuration of $$\displaystyle Ni^{2+} $$ ion is $$\displaystyle 3d^8 4s^0 $$.

One 3d, one 4s and two 4p orbitals undergo $$\displaystyle dsp^2 $$ hybridization four equivalent $$\displaystyle dsp^2 $$ hybrid orbitals which are occupied by 4 electron pairs of 4 cyanide ligands.

This forms $$\displaystyle [Ni(CN)_4]^{2-} $$.

Hence, option C is correct.

SIMILAR QUESTIONS

Chemical Bonding

The compressibility factor of an ideal gas is:

Chemical Bonding

Barium ions, $$CN^-$$ and $$Co^{2+}$$ form an ionic complex. If this complex is 75% ionised in aqueous solution with Van't Hoff factor (i) equal to four and paramagnetic moment is found to be 1.73 BM (due to spin only) then the hybridisation state to Co (II) in the complex will be :

Chemical Bonding

Select correct statement(s) regarding given complexes :

Chemical Bonding

In $${ \left[ Fe{ CN }_{ 5 }(NO) \right] }^{ 2- }$$, $$Fe$$ has $$+2$$ state. It cannot be decided by

Chemical Bonding

The type of hybridization involved in octahedral complex is :

Chemical Bonding

An octahedral complex of $$Co^{3+}$$ is diamagnetic. The hybridisation involved in the formation of the complex is:

Chemical Bonding

In a fuel cell, methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is: $$\mathrm {C}\mathrm{H}_{3}\mathrm{O}\mathrm{H}(l)+\dfrac{3}{2}\mathrm{O}_{2}(\mathrm{g})\rightarrow \mathrm{C}\mathrm{O}_{2}(\mathrm{g})+2\mathrm{H}_{2}\mathrm{O}(l)$$ At $$298\ \mathrm{K}$$, standard Gibb's energies of formation for $$\mathrm{C}\mathrm{H}_{3}\mathrm{O}\mathrm{H}(l),\ \mathrm{H}_{2}\mathrm{O}(l)$$ and $$\mathrm{C}\mathrm{O}_{2}(\mathrm{g})$$ are$$-166.2, - 237.2$$ and $$-394.4\ \mathrm{k}\mathrm{J}\mathrm{m}\mathrm{o}1^{-1}$$ respectively. If standard enthalpy of combustion of methanol is $$-726\ \mathrm{k}\mathrm{J}\mathrm{m}\mathrm{o}1^{-1}$$, efficiency of the fuel cell will be:

Chemical Bonding

The pair of metal ions that can give a spin only magnetic moment of $$3.9\ BM$$ for the complex $$[M(H_{2}O)_{6}]Cl_{2}$$, is:

Chemical Bonding

Nickel $$(Z=28)$$ combines with a uninegative monodentate ligand to form a diamagnetic complex $$[NiX_4]^{2-}$$. The hybridization involved and the number of unpaired electrons present in the complex is respectively:

Chemical Bonding

Which of the following is paramagnetic?

Contact Details