SATHEE: Co-Ordination Compounds Question 162

Co-Ordination Compounds Question 162

Question: Amongst $N i {(C O)}_{4}, {[N i {(C N)}_{4}]}^{2 -}$ and $N i C l_{4}^{2 -}$

Options:

A) $N i {(C O)}_{4}$ and $N i C l_{4}^{2 -}$ are diamagnetic and ${[N i {(C N)}_{4}]}^{2 -}$ is paramagnetic

B) ${[N i {(C N)}_{4}]}^{2 -}$ and ${[N i {(C N)}_{4}]}^{2 -}$ are diamagnetic and $N i {(C O)}_{4}$ is paramagnetic

C) $N i {(C O)}_{4}$ and ${[N i {(C N)}_{4}]}^{2 -}$ are diamagnetic and $N i C l_{4}^{2 -}$ is paramagnetic

D) $N i {(C O)}_{4}$ is diamagne and $N i C l_{4}^{2 -}$ and ${[N i {(C N)}_{4}]}^{2 -}$ are paramagnetic

Show Answer

Answer:

Correct Answer: C

Solution:

$[N i {(C O)}_{4}] :$ Oxidation state of $N i$ is 0 $N i = (Z = 28) \Rightarrow 3 d^{8} 4 s^{2}$ Co is a strong field ligand, it causes pairing. $s p^{3}$ -Hybridisation (tetrahedral) There are no unpaired electrons, so the complex is diamagnetic.

Spin magnetic moment = Zero. ${[N i C l_{4}]}^{2 -} :$ $N i^{2 +} = 3 d^{8}$ Cyano is a strong field ligand, it causes pairing. $d s p^{2}$ -hybridsation (square planar) There are no unpaired electrons so, the complex is diamagnetic.

Spin magnetic moment = zero. ${[N i C l_{4}]}^{2 -} :$ $N i^{2 +} = 3 d^{8}$ . Chloride is a weak field ligand, no pairing. $s p^{3}$ -hybridisation (tetrahedral) There are two unpaired electrons, so the complex is paramagnetic. Spin magnetic moment $μ = \sqrt{n (n + 2)} B M = \sqrt{2 (2 + 2)} B M = \sqrt{8} B M$

Co-Ordination Compounds Question 162

Question: Amongst $N i {(C O)}_{4}, {[N i {(C N)}_{4}]}^{2 -}$ and $N i C l_{4}^{2 -}$

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Co-Ordination Compounds Question 162

Question: Amongst Ni(CO)4,[Ni(CN)4]2− and NiCl42−

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Menu

Question: Amongst $N i {(C O)}_{4}, {[N i {(C N)}_{4}]}^{2 -}$ and $N i C l_{4}^{2 -}$