Coordination Compounds

A solution of \(\mathrm{FeCl_3}\) when treated with \(\mathrm{K_4[Fe(CN)_6]}\) gives a prussium blue precipitate due to the formation of :

Which of the following are the example of double salt?
A. \(\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}\)
B. $$\mathrm{CuSO}_{4}\cdot 4 \mathrm{NH}_{3} \cdot \mathrm{H}_{2} \math...

Which of the following complex will show largest splitting of d-orbitals?

The spin only magnetic moment of \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) complexes is _________ B.M. (Nearest integer)
(Given : Atomic no. of Mn is 25)

The complex cation which has two isomers is :

The homoleptic and octahedral complex of $\mathrm{Co}^{2+}$ and $\mathrm{H}_{2} \mathrm{O}$ has ___________ unpaired electron(s) in the $t_{2\mathrm{g}}$ set of orbitals.

The complex with highest magnitude of crystal field splitting energy $\left(\Delta_{0}\right)$ is :

The mismatched combinations are
A. Chlorophyll - Co
B. Water hardness - EDTA
C. Photography \(-\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}\)
D. Wilkinson catalyst \(-\left[\left(\mathrm{Ph}_{3} \mathrm{P}\right)_{3} \mathrm{RhCl}\right]\)...

Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

The total number of stereoisomers for the complex \(\left[\mathrm{Cr}(o x)_{2} \mathrm{ClBr}\right]^{3-}\) (where \(o x=\) oxalate) is :

Match List I with List II

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The ratio of spin-only magnetic moment values \(\mu_{\text {eff }}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]^{3-} / \mu_{\text {eff }}\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) is _________.

Which of the following complex has a possibility to exist as meridional isomer?

The set which does not have ambidentate ligand(s) is :

The complex that dissolves in water is :

The magnetic moment is measured in Bohr Magneton (BM).
Spin only magnetic moment of \(\mathrm{Fe}\) in \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) and \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\) comple...

Match List I with List II

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If \(\mathrm{Ni}^{2+}\) is replaced by \(\mathrm{Pt}^{2+}\) in the complex \(\left[\mathrm{NiCl}_{2} \mathrm{Br}_{2}\right]^{2-}\), which of the following properties are expected to get changed ?
A. Geometry
B. Geometrical isomerism
C. Opti...

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : \(\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}\) absorbs at lower wavelength of light with respect to $$\...

In potassium ferrocyanide, there are ________ pairs of electrons in the \(t_{2g}\) set of orbitals.

The octahedral diamagnetic low spin complex among the following is :

For a metal ion, the calculated magnetic moment is \(4.90 ~\mathrm{BM}\). This metal ion has ___________ number of unpaired electrons.

Match List I with List II

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The correct order of the number of unpaired electrons in the given complexes is
A. \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\)
B. \(\left[\mathrm{Fe} \mathrm{F}_{6}\right]^{3-}\)
C. \(\left[\mathrm{CoF}_{6}\right]^{3-}\)
D. $$\left.[...

Spin only magnetic moment (\(\mu\)s) of \({K_3}[Fe{(CN)_6}]\) is ____________ B.M.
(Nearest integer)

In the following brown complex, the oxidation state of iron is +_____________.
\({[Fe{({H_2}O)_6}]^{2 + }} + NO \to \mathop {{{[Fe{{({H_2}O)}_5}(NO)]}^{2 + }}}\limits_{\text{Brown complex}} + {H_2}O\)

Correct formula of the compound which gives a white precipitate with BaCl2 solution, but not with AgNO3 solution, is :

Given below are two statements.
\(\bullet\) Statement I : In CuSO4 . 5H2O, Cu-O bonds are present.
\(\bullet\) Statement II : In CuSO4 . 5H2O, ligands coordinating with Cu(II) ion are O-and S-based ligands.
In the light of the above stateme...

\(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\) should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is \((-)\) ____________ \(\Delta_{0}\). (Nearest integer)

Sum of oxidation state (magnitude) and coordination number of cobalt in \(\mathrm{Na}\left[\mathrm{Co}(\mathrm{bpy}) \mathrm{Cl}_{4}\right]\) is _________.

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; $$\mathrm{H}_{2} \mathrm{~N}_{-} \mathrm{CH}_{2...

Number of complexes which will exhibit synergic bonding amongst, \([Cr{(CO)_6}]\), \([Mn{(CO)_5}]\) and \([M{n_2}{(CO)_{10}}]\) is ___________.

Given below are two statements :
Statement I : [Ni(CN)4]2\(-\) is square planar and diamagnetic complex, with dsp2 hybridization for Ni but [Ni(CO)4] is tetrahedral, paramagnetic and with sp3-hybridication for Ni.
Statement II : [NiCl4]2$$...

(a) CoCl3.4NH3,    (b) CoCl3.5NH3,      (c) CoCl3.6NH3    and    (d) CoCl(NO3)2.5NH3.
Number of complex(es) which will exist in cis-trans form is/are _______________.

\({[Fe{(CN)_6}]^{4 - }}\)
\({[Fe{(CN)_6}]^{3 - }}\)
\({[Ti{(CN)_6}]^{3 - }}\)
\({[Ni{(CN)_4}]^{2 - }}\)
\({[Co{(CN)_6}]^{3 - }}\)
Among the given complexes, number of paramagnetic complexes is ____________.

Total number of relatively more stable isomer(s) possible for octahedral complex \(\left[\mathrm{Cu}(\mathrm{en})_{2}(\mathrm{SCN})_{2}\right]\) will be _________.

Match List I with List II

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Acidified potassium permanganate solution oxidises oxalic acid. The spin-only magnetic moment of the manganese product formed from the above reaction is ____________ B.M. (Nearest integer)

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. [FeF6]3\(-\)
B. [Fe(CN)6]3\(-\)
C. [MnCl6]3\(-\) (high spin)
D. [Mn(CN)6]3\(-\)
Choose the correct answer from ...

The conductivity of a solution of complex with formula \(\mathrm{CoCl}_{3}\left(\mathrm{NH}_{3}\right)_{4}\) corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is __________.

\(\mathrm{Fe}^{3+}\) cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :

Low oxidation state of metals in their complexes are common when ligands :

The spin-only magnetic moment value of an octahedral complex among CoCl3.4NH3, NiCl2.6H2O and PtCl4.2HCl, which upon reaction with excess of AgNO3 gives 2 moles of AgCl is ___________ B.M. (Nearest integer)

Which statement is not true with respect to nitrate ion test?

Reaction of [Co(H2O)6]2+ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in t2g-orbitals of the product is ___________.

The difference between spin only magnetic moment values of \(\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]\mathrm{Cl}_{2}\) and \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is _...

The metal complex that is diamagnetic is (Atomic number: \(\mathrm{Fe}, 26 ; \mathrm{Cu}, 29)\)

If [Cu(H2O)4]2+ absorbs a light of wavelength 600 nm for d-d transition, then the value of octahedral crystal field splitting energy for [Cu(H2O)6]2+ will be ____________ \(\times\) 10\(-\)21 J. [Nearest Integer]
(Given : h = 6.63 $$\times$...

Amongst FeCl3.3H2O, K3[Fe(CN)6] and [Co(NH3)6]Cl3, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is ____________ B.M. [nearest integer]