Coordination Compounds

The spin-only magnetic moment value of an octahedral complex among $\mathrm{CoCl_3\cdot4NH_3}$, $\mathrm{NiCl_2\cdot6H_2O}$ and $\mathrm{PtCl_4\cdot2HCl}$, which upon reaction with excess of $\mathrm{AgNO_3}$ gives 2 moles of AgCl 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 ?

The number of statement(s) correct from the following for Copper (at. no. 29) is/are ______.

(A) Cu(II) complexes are always paramagnetic

(B) Cu(I) complexes are generally colourless

(C) Cu(I) is easily oxidized

(D) In Fehling solution, the active reagent has Cu(I)

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:

Given below are two statements :

Statement I : $\mathrm{[Ni(CN)_4]^{2-}}$ is square planar and diamagnetic complex, with dsp$^2$ hybridization for Ni but $\mathrm{[Ni(CO)_4]}$ is tetrahedral, paramagnetic and with sp$^3$-hybridication for Ni.

Statement II : $\mathrm{[NiCl_4]^{2-}}$ and $\mathrm{[Ni(CO)_4]}$ both have same d-electron configuration, have same geometry and are paramagnetic.

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

Number of complexes which will exhibit synergic bonding amongst, $\mathrm{[Cr(CO)_6]}$, $\mathrm{[Mn(CO)_5]}$ and $\mathrm{[Mn_2(CO)_{10}]}$ is ______.

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

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

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

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

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

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

(a) $\mathrm{CoCl_3\cdot4NH_3}$, (b) $\mathrm{CoCl_3\cdot5NH_3}$, (c) $\mathrm{CoCl_3\cdot6NH_3}$ and (d) $\mathrm{CoCl(NO_3)_2\cdot5NH_3}$. Number of complex(es) which will exist in cis-trans form is/are ______.

An acidified manganate solution undergoes disproportionation reaction. The spin-only magnetic moment value of the product having manganese in higher oxidation state is ______ B.M. (Nearest integer)

Given below are two statements.

• Statement I: In $\mathrm{CuSO_4\cdot5H_2O}$, Cu-O bonds are present.

• Statement II: In $\mathrm{CuSO_4\cdot5H_2O}$, ligands coordinating with Cu(II) ion are O-and S-based ligands.

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

Spin only magnetic moment of $\mathrm{[MnBr_6]^{4-}}$ is ______ B.M. (round off to the closest integer)

For the reaction given below :

$\mathrm{CoCl_3\cdot xNH_3+AgNO_3(aq)\rightarrow}$

If two equivalents of AgCl precipitate out, then the value of $x$ will be ______.

Correct formula of the compound which gives a white precipitate with $\mathrm{BaCl_2}$ solution, but not with $\mathrm{AgNO_3}$ solution, is

In the following brown complex, the oxidation state of iron is +______.

$$\mathrm{[Fe(H_2O)_6]^{2+}+NO\rightarrow\underset{Brown\ complex}{[Fe(H_2O)_5(NO)]^{2+}}+H_2O}$$

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)

Among $\mathrm{Co^{3+}}$, $\mathrm{Ti^{2+}}$, $\mathrm{V^{2+}}$ and $\mathrm{Cr^{2+}}$ ions, one if used as a reagent cannot liberate $\mathrm{H_2}$ from dilute mineral acid solution, its spin-only magnetic moment in gaseous state 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 : $\mathrm{[Ni(H_2O)_6]^{2+}}$

The difference between spin only magnetic moment values of $\mathrm{[Co(H_2O)_6]Cl_2}$ and $\mathrm{[Cr(H_2O)_6]Cl_3}$ is ______.