Coordination Compounds
$ \text { Match the following. } $
$ \begin{array}{llll} \hline & \begin{array}{l} \text { List-I } \\ (\text { Complex }) \end{array} & & \begin{array}{l} \text { List-II } \\ \text { (Spin only magnetic } \\ \text { moment) } \end{array} \\ \hline \text { A. } & {\left[\mathrm{CoF}_6\right]^{3-}} & \text { I. } & 0 \\ \hline \text { B. } & {\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}} & \text { II. } & \sqrt{24} \\ \hline \text { C. } & {\left[\mathrm{FeF}_6\right]^{3-}} & \text { III. } & \sqrt{8} \\ \hline \text { D. } & {\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}} & \text { IV. } & \sqrt{35} \\ \hline & & \text { V. } & \sqrt{15} \\ \hline \end{array} $
The correct answer is
A-V, B-II, C-IV, D-I
A-II, B-I, C-IV, D-III
A-II, B-I, C-V, D-III
A-III, B-II, C-I, D-V
Identify the correct set for $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ ion.
(Hybridisation of $\mathrm{Co}^{3+}$, type of complex, number of unpaired electrons in the complex ion respectively.)
$d^2 s p^3$, inner orbital complex, zero
$s p^3 d^2$, outer orbital complex, three
$d^2 s p^3$, inner orbital complex, two
$s p^3 d^2$, outer orbital complex, zero
According to Werner's theory, the number of groups bonded to the central metal atom/ion in a coordination complex represent.
oxidation state
primary valency
secondary valency
polyhedron
Identify the incorrect match from the following.
The correct answer is Table
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; $\mathrm{H}_{2} \mathrm{~N}_{-} \mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$)
Match List I with List II
| List - I (Complex) | List - II (Hybridization) | ||
|---|---|---|---|
| (A) | $Ni{(CO)_4}$ | (I) | $s{p^3}$ |
| (B) | ${[Ni{(CN)_4}]^{2 - }}$ | (II) | $s{p^3}{d^2}$ |
| (C) | ${[Co{(CN)_6}]^{3 - }}$ | (III) | ${d^2}s{p^3}$ |
| (D) | ${[Co{F_6}]^{3 - }}$ | (IV) | $ds{p^2}$ |
Choose the correct answer from the options given below :
Low oxidation state of metals in their complexes are common when ligands :
$\mathrm{Fe}^{3+}$ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :
The metal complex that is diamagnetic is (Atomic number: $\mathrm{Fe}, 26 ; \mathrm{Cu}, 29)$
The correct order of energy of absorption for the following metal complexes is :
A : [Ni(en)3]2+ , B : [Ni(NH3)6]2+ , C : [Ni(H2O)6]2+
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 statements, choose the correct answer from the options given below.
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$-$ and [Ni(CO)4] both have same d-electron configuration have same geometry and are paramagnetic.
In light the above statements, choose the correct answer from the options given below :
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 options given below :
Which of the following will have maximum stabilization due to crystal field?
Which statement is not true with respect to nitrate ion test?
Transition metal complex with highest value of crystal field splitting ($\Delta$0) will be :
Match List - I with List - II :
| List - I | List -II | ||
|---|---|---|---|
| (A) | ${[PtC{l_4}]^{2 - }}$ | (I) | $s{p^3}d$ |
| (B) | $Br{F_5}$ | (II) | ${d^2}s{p^3}$ |
| (C) | $PC{l_5}$ | (III) | $ds{p^2}$ |
| (D) | ${[Co{(N{H_3})_6}]^{3 + }}$ | (IV) | $s{p^3}{d^2}$ |
Choose the most appropriate answer from the options given below :
Sum of oxidation state (magnitude) and coordination number of cobalt in $\mathrm{Na}\left[\mathrm{Co}(\mathrm{bpy}) \mathrm{Cl}_{4}\right]$ is _________.
Explanation:
Oxidation state of cobalt $=+3$
Coordination number of cobalt $=6$
[As bpy is bidentate]
So, sum $=9$
$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ 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)
Explanation:
Configuration $\Rightarrow t_{2 g}^{5}$
CFSE $=5 \times \frac{-2}{5} \Delta_{0}=-2 \Delta_{0}$
Total number of relatively more stable isomer(s) possible for octahedral complex $\left[\mathrm{Cu}(\mathrm{en})_{2}(\mathrm{SCN})_{2}\right]$ will be _________.
Explanation:
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 __________.
Explanation:
$\therefore$ Possible compound is $\rightarrow\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]^{+} \mathrm{Cl}^{-}$
Oxidation state of central atom represents the total number of primary valency
$\therefore$ Primary valency will be 3 .
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 ___________.
Explanation:
$\mathrm{H}_{2} \mathrm{O}$ is weak field ligand.
$\mathrm{Co}^{+2} \rightarrow 3 d^{7}$
$ \begin{aligned} \mathrm{n}=3 \quad \mu_{1} &=\sqrt{n(\mathrm{n}+2)} \\ &=\sqrt{15} \text { B.M. } \end{aligned} $
$\mathrm{Cr} \rightarrow 4 s^{1} 3 d^{5}$
$\mathrm{Co}^{+3} \rightarrow 3 d^{3}$
$\mathrm{n}=3 \quad \mu_{2}=\sqrt{15}$ B.M.
$\mu_{1}-\mu_{2}=0$
Consider the following metal complexes :
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$
$\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}$
$\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}$
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}$
The spin-only magnetic moment value of the complex that absorbes light with shortest wavelength is _____________ B. M. (Nearest integer)
Explanation:
The stronger the ligand, the higher the crystal field splitting.
So, the order of crystal field splitting is
$\left[\mathrm{Co}(\mathrm{CN})_{6}\right]^{3-}>\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}>\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{3+}>$ $\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{5}\right]^{2+}$
Shortest wavelength is shown by complex having maximum crystal field splitting.
Spin only magnetic moment $=\sqrt{0(0+2)}=0$ B.M
In the following brown complex, the oxidation state of iron is +_____________.
${[Fe{({H_2}O)_6}]^{2 + }} + NO \to \mathop {{{[Fe{{({H_2}O)}_5}(NO)]}^{2 + }}}\limits_{\text{Brown complex}} + {H_2}O$
Explanation:
To determine the oxidation state of iron in the brown complex ${[Fe({H_2}O)_5(NO)]^{2+}}$, we need to analyze the ligands and their charges, as well as the overall charge of the complex.
Step 1: Understanding the Complex
The complex is:
$ {[Fe({H_2}O)_5(NO)]^{2+}} $
Iron (Fe): The central metal atom whose oxidation state we need to find.
Ligands:
5 Water Molecules ($H_2O$): Neutral ligands (charge = 0).
1 Nitrosyl Group (NO): Can have different charges depending on its mode of bonding.
Step 2: Assigning Charges to Ligands
Water ($H_2O$): Neutral ligand, so it contributes 0 to the overall charge.
Nitrosyl (NO): Can act as:
NO$^+$ (nitrosonium ion) with a +1 charge.
NO (neutral molecule) with 0 charge.
NO$^-$ (nitroxide ion) with a –1 charge.
Step 3: Setting Up the Oxidation State Equation
Let $ x $ be the oxidation state of Fe.
The sum of the oxidation states of all components equals the overall charge of the complex:
$ x + (5 \times 0) + (\text{Charge of NO}) = +2 $
Simplifying:
$ x + (\text{Charge of NO}) = +2 $
Step 4: Determining the Charge of NO in the Complex
In the brown ring complex, experimental evidence shows that the nitrosyl ligand acts as NO$^+$. This is because:
The NO ligand forms a linear bond with Fe, characteristic of NO$^+$.
The complex is known to involve a reduction of the oxidation state of Fe to an unusual value.
Thus, Charge of NO = +1.
Step 5: Calculating the Oxidation State of Fe
Substitute the charge of NO into the equation:
$ x + (+1) = +2 $
Solving for $ x $:
$ x = +2 - (+1) = +1 $
Therefore, the oxidation state of Fe in the brown complex is $ +1 $.
Conclusion
The oxidation state of iron in ${[Fe({H_2}O)_5(NO)]^{2+}}$ is +1.
Spin only magnetic moment ($\mu$s) of ${K_3}[Fe{(CN)_6}]$ is ____________ B.M.
(Nearest integer)
Explanation:
$\mathrm{CN}^{-}$ have $-1$ oxidation State.
Let oxidation state of $\mathrm{Fe}$ in the complex is $x$.
So, $x-6=-3 \Rightarrow x=+3$
Now, $\mathrm{CN}^{-}$ion is a strong field ligand.
For $Fe^{3+}: -3d^54s^0$
Unpaired electron $=1$
$\mu_{\mathrm{B}}=\sqrt{n(n+2)}=\sqrt{1 \times(1+2)}=1.7$
$\mu_{\mathrm{B}}=2$ B.M
${[Fe{(CN)_6}]^{4 - }}$
${[Fe{(CN)_6}]^{3 - }}$
${[Ti{(CN)_6}]^{3 - }}$
${[Ni{(CN)_4}]^{2 - }}$
${[Co{(CN)_6}]^{3 - }}$
Among the given complexes, number of paramagnetic complexes is ____________.
Explanation:
$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} \quad$ Paramagnetic (1 unpaired electron)
$\left[\mathrm{Ti}(\mathrm{CN})_6\right]^{3-} \quad$ Paramagnetic (1 unpaired electron)
$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-} \quad$ Diamagnetic
$\left[\mathrm{Co}(\mathrm{CN})_6\right]^{3-} \quad$ Diamagnetic
(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 _______________.
Explanation:
$\mathrm{CoCl}_{3} \cdot 5 \mathrm{NH}_{3} \Rightarrow\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}_{2}$
$\mathrm{CoCl}_{3} \cdot 6 \mathrm{NH}_{3} \Rightarrow\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{3}$
Only $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right]$ can show geometrical isomerism. Hence can exist in cis-trans form.
Number of complexes which will exhibit synergic bonding amongst, $[Cr{(CO)_6}]$, $[Mn{(CO)_5}]$ and $[M{n_2}{(CO)_{10}}]$ is ___________.
Explanation:
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)
Explanation:
$\mathrm{Mn}^{+2}$ has 5 unpaired electrons
$\therefore $ Spin only magnetic moment $=\sqrt{5(5+2)}$
$ \begin{aligned} &=\sqrt{5 \times 7} \\\\ &=\sqrt{35} \\\\ &\simeq 5.92 \text { B.M. } \\\\ &\simeq 6 \text { B.M. } \end{aligned} $
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 ___________.
Explanation:
$ \mathrm{Co}^{+3} \longrightarrow 3 \mathrm{~d}^{6} $
$\mathrm{NH}_{3}$ is a strong field ligand.
$ 3 \mathrm{~d}^{6} \longrightarrow \mathrm{t}_{2 \mathrm{~g}}^{6} ~\mathrm{eg}^{\circ} $
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)
Explanation:
From the given information, we are looking for a complex which, upon reaction with excess of AgNO₃, gives 2 moles of AgCl. This implies that the complex has 2 chloride ions involved.
Considering the complexes :
- CoCl₃.4NH₃ : This complex has 3 chloride ions, so it's not the one we are looking for.
- NiCl₂.6H₂O : This complex has 2 chloride ions, so it's a potential candidate.
- PtCl₄.2HCl : This complex has 4 chloride ions, so it's not the one we are looking for.
Therefore, the complex we are interested in is NiCl₂.6H₂O.
$\mathrm{CoCl}_{3} \cdot 4 \mathrm{NH}_{3} \underset{\text { excess }}{\stackrel{\mathrm{AgNO}_{3}}{\longrightarrow}}\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \cdot \mathrm{Cl}_{2}\right]+\mathrm{AgCl}$$ \left.\left.\mathrm{NiCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \underset{\text { excess }}{\stackrel{\mathrm{AgNO}_{3}}{\longrightarrow}}\right[ \mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}+2 \mathrm{AgCl} $
$\mathrm{PtCl}_{4} \cdot 2 \mathrm{HCl} \longrightarrow\left[\mathrm{PtCl}_{6}\right]^{4-}+\mathrm{No} ~\mathrm{AgCl} ~\mathrm{ppt}$
The next step is to find the oxidation state of the nickel ion. The nickel ion must have a charge of +2 to balance the -2 charge from the two chloride ions, thus it is Ni2+.
In the case of Ni²⁺, the electron configuration is [Ar]3d8. For an octahedral complex, the d-orbitals split into two sets under the influence of ligands: the $e_g$ set which includes d(x²-y²) and d(z²) orbitals, and the $t_{2g}$ set which includes the d(xy), d(xz), and d(yz) orbitals. Electrons will occupy the lower energy $t_{2g}$ orbitals first.
The 3d8 electron configuration implies there are 8 electrons in the 3d orbitals. The first six electrons pair up in the three $t_{2g}$ orbitals, and the next two electrons will go into the two $e_g$ orbitals, with each one having one unpaired electron.
The spin-only magnetic moment (μ) can be calculated using the formula :
$ \mu = \sqrt{n(n+2)} \, \text{B.M.} $
where n is the number of unpaired electrons. In this case, n = 2, so
$ \mu = \sqrt{2 \times (2+2)} = \sqrt{8} \, \text{B.M.} $
Rounding to the nearest integer, the spin-only magnetic moment is approximately 3 B.M.
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]
Explanation:
$ \mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \rightarrow \text { Inner-orbital complex } $
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{3} \rightarrow$ Inner-orbital complex
Since $\mathrm{CN}^{-}$is a strong field ligand than $\mathrm{NH}_{3}$. Hence $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$ is the inner-orbital complex that absorbs light at shortest wavelength.
$\mathrm{Fe}(\text{III}) \rightarrow$ valence shell configuration $3 \mathrm{~d}^{5}$
Since $\mathrm{CN}^{-}$will do pairing, so unpaired electron $=1$
$ \mu=\sqrt{1(1+2)}=\sqrt{3} \mathrm{BM} \simeq 2 \mathrm{BM} $
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 $\times$ 10$-$34 Js and c = 3.08 $\times$ 108 ms$-$1)
Explanation:
$\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ is octahedral
$ \because \Delta_{\mathrm{t}}=\frac{4}{9} \times \Delta_{0} $
$ \begin{aligned} &\Delta_{\mathrm{t}}=\frac{6.63 \times 10^{-34} \times 3.08 \times 10^{8}}{600 \times 10^{-9}} \\\\ &\Delta_{0}=\frac{9}{4} \times \frac{6.63 \times 10^{-34} \times 3.08 \times 10^{8}}{600 \times 10^{-9}} \approx 765.7 \times 10^{-21} \mathrm{~J} \end{aligned} $
In the cobalt-carbonyl complex : [Co2(CO)8], number of Co-Co bonds is "X" and terminal CO ligands is "Y". X + Y = ___________.
Explanation:
x = 1
y = 6
$\therefore$ x + y = 7
LIST-I contains metal species and LIST-II contains their properties.
| List-I | List-II |
|---|---|
| (I) $\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]^{4-}$ |
(P) $t_{2 \mathrm{g}}$ orbitals contain 4 electrons |
| (II) $\left[\mathrm{RuCl}_{6}\right]^{2-}$ | (Q) $\mu$ (spin-only $)=4.9 \mathrm{BM}$ |
| (III) $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ |
(R) low spin complex ion |
| (IV) $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ |
(S) metal ion in $4+$ oxidation state |
| (T) $d^{4}$ species |
[Given: Atomic number of $\mathrm{Cr}=24, \mathrm{Ru}=44, \mathrm{Fe}=26$ ]
Match each metal species in LIST-I with their properties in LIST-II, and choose the correct option
$ \text { Match the following } $
| Column -I (Reaction) |
Column - II (Colour of the product or nature) | ||
|---|---|---|---|
| (A) | $\mathrm{FeCl}_3(\mathrm{aq})+\mathrm{NH}_3(\mathrm{aq}) \longrightarrow$ | (l) | Green ppt. |
| (B) | $\mathrm{AgCl}(\mathrm{aq})+\mathrm{NH}_3(\mathrm{aq}) \longrightarrow$ | (II) | Deep blue |
| (C) | $\mathrm{Cu}^{2+}(\mathrm{aq})+\mathrm{NH}_3(\mathrm{aq}) \longrightarrow$ | (III) | Brown ppt. |
| (IV) | Colourless | ||
$ \text { The correct match } $
| A | B | C |
|---|---|---|
| I | II | III |
| A | B | C |
|---|---|---|
| I | III | IV |
| A | B | C |
|---|---|---|
| III | IV | II |
| A | B | C |
|---|---|---|
| III | I | IV |
Secondary valences of the following complexes based on their reactions with excess $\mathrm{AgNO}_3$ are
$ \begin{array}{llc} \hline & \begin{array}{l} \text { Formula of the } \\ \text { complexes } \end{array} & \begin{array}{c} \text { Moles of } \mathrm{AgCl} \text { precipitated } \\ \text { per mole of complex } \end{array} \\ \hline \text { (I) } & \mathrm{CoCl}_3 \cdot 6 \mathrm{H}_2 \mathrm{O} & 3 \\ \hline \text { (II) } & \mathrm{NiCl}_3 \cdot 6 \mathrm{H}_2 \mathrm{O} & 2 \\ \hline \text { (III) } & \mathrm{Co}\left(\mathrm{SO}_4\right) \mathrm{Br} \cdot 5 \mathrm{NH}_3 & 1 \\ \hline \end{array} $| I | II | III |
|---|---|---|
| 4 | 6 | 6 |
| I | II | III |
|---|---|---|
| 6 | 4 | 4 |
| I | II | III |
|---|---|---|
| 6 | 4 | 6 |
| I | II | III |
|---|---|---|
| 6 | 6 | 6 |
The pair in which both the species have same magnetic moment (spin only) is
$\left[\mathrm{CoCl}_4\right]^{2-},\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2-}$
$\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$
$\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{CoCl}_4\right]^{2-}$
A metal complex absorbed orange light. The colour in which it appears is
yellow
yellow- green
red
green - blue
Among the given complexes the possess " $\mathrm{CO}^{\prime \prime}$ as a bridged ligands are
I. $\left[\mathrm{Co}_2(\mathrm{CO})_8\right]$
II. $\left[\mathrm{Fe}_3(\mathrm{CO})_{12}\right]$
III. $\left[\mathrm{Mn}_2(\mathrm{CO})_{10}\right]$
IV. $\left[\mathrm{Fe}_2(\mathrm{CO})_9\right]$
I, II and III
II, III and IV
I, II and IV
I, III and IV
The correct order of decreasing field strength of the below given ligands is
I $>$ II $>$ IV $>$ III
III $>$ II $>$ IV $>$ I
III $>$ I $>$ IV $>$ II
III $>$ IV $>$ I $>$ II
An element '$X$' with the atomic number 13 forms a complex of the type $[\mathrm{XCl}(\mathrm{H}_2 \mathrm{O})_5]^{2+}$. The covalency and oxidation state of $X$ in it are respectively
Identify the species, which does not exist?
The homoleptic complex in the following is
The crystal field theory is successful in explaining which of the following?
I. Ligands as point charges.
II. Formation and structures of complexes.
III. Colour.
IV. Magnetic properties.
V. Covalent character of metal-ligand bonding.
Which of the following is correct related to the colours of $\mathrm{TiCl}_3(X)$ and $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3(Y)$ ?
