Crystal field theory

$\mathrm{[Fe(CN)_6]^{4-}}$

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

$\mathrm{[Ti(CN)_6]^{3-}}$

$\mathrm{[Ni(CN)_4]^{2-}}$

$\mathrm{[Co(CN)_6]^{3-}}$

Among the given complexes, number of paramagnetic complexes is ______.

Spin only magnetic moment ($\mu_s$) of $\mathrm{K_3[Fe(CN)_6]}$ is ______ B.M. (Nearest integer).

Consider the following metal complexes :

$\mathrm{[Co(NH_3)_6]^{3+}}$

$\mathrm{[CoCl(NH_3)_5]^{2+}}$

$\mathrm{[Co(CN)_6]^{3-}}$

$\mathrm{[Co(NH_3)_5(H_2O)]^{3+}}$

The spin-only magnetic moment value of the complex that absorbes light with shortest wavelength is ______ B.M. (Nearest integer)

The correct order of energy of absorption for the following metal complexes is

A : $\mathrm{[Ni(en)_3]^{2+}}$, B : $\mathrm{[Ni(NH_3)_6]^{2+}}$, C : $\mathrm{[Ni(H_2O)_6]^{2+}}$

$\mathrm{[Fe(CN)_6]^{3-}}$ should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (−) _______ Δ$_o$. (Nearest integer)

Which of the following 3d-metal ion will give the lowest enthalpy of hydration ($\Delta_{hyd}H$) when dissolved in water ?

Octahedral complexes of copper(II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will show the maximum structural distortion? (en − ethylenediamine: H$_2$N-CH$_2$-CH$_2$-NH$_2$)

In low and high spin octahedral Co$^{3+}$ complexes the number of electrons in t$_{2g}$ level respectively will be . (given At. no. of Co, 27)

The calculated spin only magnetic moments of $\ce{[Cr(NH3)6]^{3+}}$ and $\ce{[CuF6]^{3-}}$ in BM, respectively, are

(Atomic numbers of Cr and Cu are 24 and 29, respectively)

The correct option(s) regarding the complex $[\mathrm{Co(en)(NH_3)_3(H_2O)}]^{3+}$ (en = $\mathrm{H_2NCH_2CH_2NH_2}$) is (are)

Addition of excess aqueous ammonia to a pink coloured aqueous solution of $\ce{MCl2.6H2O}$ (X) and $\ce{NH4Cl}$ gives an octahedral complex Y in the presence of air. In aqueous solution, complex Y behaves as 1:3 electrolyte. The reaction of X with excess HCl at room temperature results in the formation of a blue coloured complex Z. The calculated spin only magnetic moment of X and Z is 3.87 B.M., whereas it is zero for complex Y.

Among the following options, which statement(s) is(are) correct?

Among $\ce{[Ni(CO)4]}$, $\ce{[NiCl4]^{2-}}$, $\ce{[Co(NH3)4Cl2]Cl}$, $\ce{Na3[CoF6]}$, $\ce{Na2O2}$ and $\ce{CsO2}$, the total number of paramagnetic compounds is

The geometries of the ammonia complexes of $\ce{Ni^{2+}}$, $\ce{Pt^{2+}}$ and $\ce{Zn^{2+}}$, respectively, are

The pair having the same magnetic moment is :

[At. No. : Cr = 24, Mn = 25, Fe = 26, Co = 27]

Identify the correct trend given below :

(Atomic No. = Ti : 22, Cr : 24 and Mo : 42)

For the octahedral complexes of $\ce{Fe^{3+}}$ in $\ce{SCN-}$ (thiocyanato-S) and in $\ce{CN-}$ ligand environments, the difference between the spin-only magnetic moments in Bohr magnetons (when approximated to the nearest integer) is

[Atomic number of Fe = 26]

When concentrated HCl is added to an aqueous solution of $\ce{CoCl2}$, its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in this reaction ?

Which of the following complex ions has electrons that are symmetrically filled in both $t_{2g}$ and $e_g$ orbitals ?

M1, Q and R, respectively are

The octahedral complex of a metal ion $\ce{M^3+}$ with four monodentate ligands $L_1$, $L_2$, $L_3$ and $L_4$ absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is :