Crystal field theory

Match List - I with List - II.

Choose the correct answer from the options given below :

Given below are two statements :

Statement I : Among Zn, Mn, Sc and Cu, the energy required to remove the third valence electron is highest for Zn and lowest for Sc.

Statement II : The correct order of the following complexes in terms of CFSE is $\ce{[Co(H2O)6]^{2+}} < \ce{[Co(H2O)6]^{3+}} < \ce{[Co(en)3]^{3+}}$.

In the light of the above statements, choose the correct answer from the options given below :

Consider the metal complexes $\ce{[Ni(en)3]^{2+}}$ (A), $\ce{[NiCl4]^{2-}}$ (B) and $\ce{[Ni(NH3)6]^{2+}}$ (C). Choose the CORRECT option by considering the number of unpaired electrons present in (A), (B) and (C) respectively and the order of frequency of absorption.

Given below are two statements:

Statement I: Each electron in $e_g$ orbitals destabilizes the orbitals by $+0.6\,\Delta_o$ and each electron in the $t_{2g}$ orbitals stabilizes the orbitals by $-0.4\,\Delta_o$ in an octahedral field on the basis of crystal field theory.

Statement II: All the d-orbitals of the transition metals have the same energy in their free atomic state but when a complex is formed the ligands destroy the degeneracy of these orbitals on the basis of crystal field theory.

In the light of the above statements, choose the correct answer from the options given below

Given below are two statements :

Statement I: Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation.

Statement II: $d_{xy}=d_{xz}=d_{yz}<d_{x^2-y^2}=d_{z^2}$ and $d_{x^2-y^2}=d_{z^2}<d_{xy}=d_{xz}=d_{yz}$ are the d-orbital splittings in $\ce{[Fe(H2O)6]^3+}$ and $\ce{[NiCl4]^2-}$ complex ions respectively.

In the light of the above statements, choose the correct answer from the options given below :

The total number of unpaired electrons present in the $d^3$, $d^4$ (low spin) $d^5$ (high spin), $d^6$ (high spin) and $d^7$ (low spin) octahedral complex systems is ________.

Match the LIST-I with LIST-II

Choose the correct answer from the options given below:

Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex?

A. $d_{xy}=d_{xz}>d_{x^2-y^2}$

B. $d_{xy}=d_{yz}>d_{z^2}$

C. $d_{x^2-y^2}>d_{z^2}>d_{xz}$

D. $d_{x^2-y^2}=d_{z^2}<d_{xz}$

Choose the correct answer from the given below:

Number of paramagnetic complexes among the following is ________.

$\ce{[MnBr4]^2-}$, $\ce{[NiCl4]^2-}$, $\ce{[Ni(CN)4]^2-}$, $\ce{[Ni(CO)4]}$, $\ce{[CoF6]^3-}$, $\ce{[Fe(CN)6]^4-}$, $\ce{[Mn(CN)6]^3-}$, $\ce{[Ti(CN)6]^3-}$, $\ce{[Cu(H2O)6]^2+}$, $\ce{[Co(C2O4)3]^3-}$

The correct order of the wavelength maxima of the absorption band in the ultraviolet-visible region for the given complexes is

The sum of the spin only magnetic moment values (in B.M.) of $\ce{[Mn(Br)6]^3-}$ and $\ce{[Mn(CN)6]^3-}$ is _____.

Among the following complexes, the total number of diamagnetic species is _____.

$\ce{[Mn(NH3)6]^3+}$, $\ce{[MnCl6]^3-}$, $\ce{[FeF6]^3-}$, $\ce{[CoF6]^3-}$, $\ce{[Fe(NH3)6]^3+}$, and $\ce{[Co(en)3]^3+}$

[Given, atomic number: Mn = 25, Fe = 26, Co = 27; en = $\ce{H2NCH2CH2NH2}$]

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option.

[Atomic Number: Fe = 26, Mn = 25, Co = 27]

LIST-I contains metal species and LIST-II contains their properties.

[Given: Atomic number of Cr = 24, Ru = 44, Fe = 26]

Match each metal species in LIST-I with their properties in LIST-II, and choose the correct option

Transition metal complex with highest value of crystal field splitting ($\Delta_0$) will be

If $\mathrm{[Cu(H_2O)_4]^{2+}}$ absorbs a light of wavelength 600 nm for d-d transition, then the value of octahedral crystal field splitting energy for $\mathrm{[Cu(H_2O)_6]^{2+}}$ will be ______ $\times10^{-21}$ J. [Nearest integer]

(Given : $h=6.63\times10^{-34}$ Js and $c=3.08\times10^8\ \mathrm{ms^{-1}}$)

Amongst $\mathrm{FeCl_3\cdot3H_2O}$, $\mathrm{K_3[Fe(CN)_6]}$ and $\mathrm{[Co(NH_3)_6]Cl_3}$, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is ______ B.M. [nearest integer]

Reaction of $\mathrm{[Co(H_2O)_6]^{2+}}$ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in $t_{2g}$-orbitals of the product is ______.

Which of the following will have maximum stabilization due to crystal field ?

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers: Mn = 25; Fe = 26)

A. $\mathrm{[FeF_6]^{3-}}$

B. $\mathrm{[Fe(CN)_6]^{3-}}$

C. $\mathrm{[MnCl_6]^{3-}}$ (high spin)

D. $\mathrm{[Mn(CN)_6]^{3-}}$

Choose the correct answer from the options given below: