Coordination Compounds PYQs - Last 5 Years
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ChemistryInorganic Chemistry2022-2026
Practice 205 JEE Main Chemistry questions from Coordination Compounds. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 5 Years Coordination Compounds Questions
Showing 50 of 205 filtered questions.
1Coordination Compounds
Number of paramagnetic complexes among the following is $\_\_\_\_$ .
$$ \begin{aligned} & {\left[\mathrm{MnBr}_4\right]^{2-},\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CO})_4\rig...
$$ \begin{aligned} & {\left[\mathrm{MnBr}_4\right]^{2-},\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CO})_4\rig...
INTEGER+4 / -12026
2Coordination Compounds
\(\text { Match the LIST-I with LIST-II }\)
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MCQ+4 / -12026
3Coordination Compounds
Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex?
A. $\mathrm{d}_{x y}=\mathrm{d}_{x z}>\mathrm{d}_{{x^2}-\mathrm{y}^2}$
B. $\mathrm{d}_{x y}=\mathrm{d}_{y z}>\mathrm{d}_{z^2}$
C. $\mathrm{d}...
A. $\mathrm{d}_{x y}=\mathrm{d}_{x z}>\mathrm{d}_{{x^2}-\mathrm{y}^2}$
B. $\mathrm{d}_{x y}=\mathrm{d}_{y z}>\mathrm{d}_{z^2}$
C. $\mathrm{d}...
MCQ+4 / -12026
4Coordination Compounds
An excess of $\mathrm{AgNO}_3$ is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles of AgCl precipitated will be $\_\_\_\_$ $\times 10^{-3}$.
(Nearest integer)
(Nearest integer)
INTEGER+4 / -12026
5Coordination Compounds
Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds?
A. $\left[\mathrm{NiCl}_4\right]^{2-}-\mathrm{sp}^3$, tetrahedral, paramagnetic
B. $\left[\mathrm{Ni}\left(\ma...
A. $\left[\mathrm{NiCl}_4\right]^{2-}-\mathrm{sp}^3$, tetrahedral, paramagnetic
B. $\left[\mathrm{Ni}\left(\ma...
MCQ+4 / -12026
6Coordination Compounds
Given below are two statements:
Statement I: Each electron in $\mathrm{e}_{\mathrm{g}}$ orbitals destabilizes the orbitals by $+0.6 \Delta_{\mathrm{o}}$ and each electron in the $t_{2 g}$ orbitals stabilizes the orbitals by $-0.4 \Delta_0$ ...
Statement I: Each electron in $\mathrm{e}_{\mathrm{g}}$ orbitals destabilizes the orbitals by $+0.6 \Delta_{\mathrm{o}}$ and each electron in the $t_{2 g}$ orbitals stabilizes the orbitals by $-0.4 \Delta_0$ ...
MCQ+4 / -12026
7Coordination Compounds
The correct statements about metal carbonyls are
A. The metal-carbon bonds in metal carbonyls possess both $\sigma$ and $\pi$ character.
B. Due to synergic bonding interactions between metal and CO ligand, the metal-carbon bond becomes weak...
A. The metal-carbon bonds in metal carbonyls possess both $\sigma$ and $\pi$ character.
B. Due to synergic bonding interactions between metal and CO ligand, the metal-carbon bond becomes weak...
MCQ+4 / -12026
8Coordination Compounds
The total number of unpaired electrons present in the $d^3, d^4$ (low spin) $d^5$ (high spin), $\mathrm{d}^6$ (high spin) and $\mathrm{d}^7$ (low spin) octahedral complex systems is $\_\_\_\_$ .
INTEGER+4 / -12026
9Coordination Compounds
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 : $\quad \mathrm{d}_{x y}=\mathrm{d}_{x z}=\mathrm{d}_{y...
Statement I : Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomisation.
Statement II : $\quad \mathrm{d}_{x y}=\mathrm{d}_{x z}=\mathrm{d}_{y...
MCQ+4 / -12026
10Coordination Compounds
Identify the correct statements from the following
A. $\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ is the most stable complex among $\left[\mathrm{Fe}(\mathrm{OH})_6\right]^{3-},\left[\mathrm{Fe}\left(\mathrm{C}_2...
A. $\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ is the most stable complex among $\left[\mathrm{Fe}(\mathrm{OH})_6\right]^{3-},\left[\mathrm{Fe}\left(\mathrm{C}_2...
MCQ+4 / -12026
11Coordination Compounds
\(\text { Match the LIST-I with LIST-II }\)
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MCQ+4 / -12026
12Coordination Compounds
Consider the metal complexes $\left[\mathrm{Ni}(\mathrm{en})_3\right]^{2+}(\mathrm{A}),\left[\mathrm{NiCl}_4\right]^{2-}(\mathrm{B})$ and $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}(\mathrm{C})$. Choose the CORRECT option by ...
MCQ+4 / -12026
13Coordination Compounds
5.33 g of CrCl3·6H2O, which is a 1 : 3 electrolyte, is dissolved in water and is passed through a cation exchanger. The chloride ions in the eluted solution, on treatment with AgNO3 results in 8.61 g of AgCl. The ratio of moles of complex r...
INTEGER+4 / -12026
14Coordination Compounds
Match List - I with List - II.
List - I Chromium (III) Complexes (en = ethylene diamine)
List - II Δ₀ (cm⁻¹)
A
[Cr(CN)₆]³⁻
I. 15,060
B
[CrF₆]³⁻
II. 17,400
C
[Cr(H₂O)₆]³⁺
...
List - I Chromium (III) Complexes (en = ethylene diamine)
List - II Δ₀ (cm⁻¹)
A
[Cr(CN)₆]³⁻
I. 15,060
B
[CrF₆]³⁻
II. 17,400
C
[Cr(H₂O)₆]³⁺
...
MCQ+4 / -12026
15Coordination Compounds
Which of the following complexes will show coordination isomerism?A. $[\mathrm{Ag(NH}_3)_2][\mathrm{Ag(CN)}_2]$B. $[\mathrm{Co(NH}_3)_6][\mathrm{Cr(CN)}_6]$C. $[\mathrm{Co(NH}_3)_6][\mathrm{Co(CN)}_6]$D. $[\mathrm{Fe(NH}_3)_6][\mathrm{Co(CN...
MCQ+4 / -12026
16Coordination Compounds
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 CF...
MCQ+4 / -12026
17Coordination Compounds
X is the number of geometrical isomers exhibited by $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{BrCl}\right]$.
Y is the number of optically inactive isomer(s) exhibited by $\left[\mathrm{CrCl}_2(...
Y is the number of optically inactive isomer(s) exhibited by $\left[\mathrm{CrCl}_2(...
INTEGER+4 / -12026
18Coordination Compounds
The correct statement among the following is:
MCQ+4 / -12026
19Coordination Compounds
The number of isoelectronic species among $Sc^{3+}, Cr^{2+}, Mn^{3+}, Co^{3+}$ and $Fe^{3+}$ is ‘n’. If ‘n’ moles of AgCl is formed during the reaction of complex with formula $CoCl_3(en)_2NH_3$ with excess of $AgNO_3$ solution, then the nu...
INTEGER+4 / -12026
20Coordination Compounds
The correct increasing order of spin-only magnetic moment values of the complex ions
[MnBr4]2− (A), [Cu(H2O)6]2+ (B), [Ni(CN)4]2− (C) and [Ni(H2O)6]2+ (D) is :
[MnBr4]2− (A), [Cu(H2O)6]2+ (B), [Ni(CN)4]2− (C) and [Ni(H2O)6]2+ (D) is :
MCQ+4 / -12026
21Coordination Compounds
Given below are two statements:
Statement I : The number of paramagnetic species among $\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{TiF}_6\right]^{3-}$, $\mathrm{V}_2 \mathrm{O}_5$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ is 3 ...
Statement I : The number of paramagnetic species among $\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{TiF}_6\right]^{3-}$, $\mathrm{V}_2 \mathrm{O}_5$ and $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$ is 3 ...
MCQ+4 / -12026
22Coordination Compounds
Consider a mixture ' X ' which is made by dissolving 0.4 mol of $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{SO}_4\right] \mathrm{Br}$ and 0.4 mol of $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Br}\right] \mathrm{SO}_4$...
MCQ+4 / -12026
23Coordination Compounds
Given below are two statements :
Statement I : Hybridisation, shape and spin only magnetic moment of $\mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{CO}_3\right)_3\right]$ is $\mathrm{sp}^3 \mathrm{~d}^2$, octahedral and 4.9 BM respectively.
St...
Statement I : Hybridisation, shape and spin only magnetic moment of $\mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{CO}_3\right)_3\right]$ is $\mathrm{sp}^3 \mathrm{~d}^2$, octahedral and 4.9 BM respectively.
St...
MCQ+4 / -12026
24Coordination Compounds
A chromium complex with a formula $\mathrm{CrCl}_3 \cdot 6 \mathrm{H}_2 \mathrm{O}$ has a spin only magnetic moment value of 3.87 BM and its solution conductivity corresponds to $1: 2$ electrolyte. 2.75 g of the complex solution was initial...
INTEGER+4 / -12026
25Coordination Compounds
\(\text { The wavelength of light absorbed for the following complexes are in the order }\)
MCQ+4 / -12026
26Coordination Compounds
The crystal field splitting energy of $\left[\mathrm{Co}(\text { oxalate })_3\right]^{3-}$ complex is ' $n^{\prime}$ times that of the $\left[\mathrm{Cr}(\text { oxalate })_3\right]^{3-}$ complex. Here ' $n$ ' is $\_\_\_\_$ . (Assume $\Delt...
INTEGER+4 / -12026
27Coordination Compounds
Given below are two statements :
Statement I : $\left[\mathrm{CoBr}_4\right]^{2-}$ ion will absorb light of lower energy than $\left[\mathrm{CoCl}_4\right]^{2-}$ ion.
Statement II : In $\left[\mathrm{CoI}_4\right]^{2-}$ ion, the energy sepa...
Statement I : $\left[\mathrm{CoBr}_4\right]^{2-}$ ion will absorb light of lower energy than $\left[\mathrm{CoCl}_4\right]^{2-}$ ion.
Statement II : In $\left[\mathrm{CoI}_4\right]^{2-}$ ion, the energy sepa...
MCQ+4 / -12026
28Coordination Compounds
The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are :
A. It is red in colour.
B. It has a high solubility in water at $\mathrm{pH}=9$.
C. The Ni ion has two unpaired d-electrons.
D. The $\mathrm{N}-\mathrm...
A. It is red in colour.
B. It has a high solubility in water at $\mathrm{pH}=9$.
C. The Ni ion has two unpaired d-electrons.
D. The $\mathrm{N}-\mathrm...
MCQ+4 / -12026
29Coordination Compounds
Total number of unpaired electrons present in the central metal atoms/ions of
$\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_2\right],\left[\mathrm{Ni}(\mathrm{CN}...
$\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_2\right],\left[\mathrm{Ni}(\mathrm{CN}...
INTEGER+4 / -12026
30Coordination Compounds
Identify the CORRECT set of details from the following :
A. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ : Inner orbital complex; $\mathrm{d}^2 \mathrm{sp}^3$ hybridized
B. $\left[\mathrm{MnCl}_6\right]^{3-}$ : Outer orbital ...
A. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ : Inner orbital complex; $\mathrm{d}^2 \mathrm{sp}^3$ hybridized
B. $\left[\mathrm{MnCl}_6\right]^{3-}$ : Outer orbital ...
MCQ+4 / -12026
31Coordination Compounds
A first row transition metal $(\mathrm{M})$ does not liberate $\mathrm{H}_2$ gas from dilute HCl .1 mol of aqueous solution of $\mathrm{MSO}_4$ is treated with excess of aqueous KCN and then $\mathrm{H}_2 \mathrm{~S}(\mathrm{~g})$ is passed...
MCQ+4 / -12026
32Coordination Compounds
Consider the transition metal ions $\mathrm{Mn}^{3+}, \mathrm{Cr}^{3+}, \mathrm{Fe}^{3+}$ and $\mathrm{Co}^{3+}$ and all form low spin octahedral complexes. The correct decreasing order of unpaired electrons in their respective d-orbitals o...
MCQ+4 / -12026
33Coordination Compounds
$\left[\mathrm{Ni}\left(\mathrm{PPh}_3\right)_2 \mathrm{Cl}_2\right]$ is a paramagnetic complex. Identify the INCORRECT statements about this complex.
A. The complex exhibits geometrical isomerism.
B. The complex is white in colour.
C. The ...
A. The complex exhibits geometrical isomerism.
B. The complex is white in colour.
C. The ...
MCQ+4 / -12026
34Coordination Compounds
Given below are two statements :
Statement I : Among $\left.\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+},\left[\mathrm{Ni}(\mathrm{en})_3\right)\right]^{2+},\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$ and $\left[...
Statement I : Among $\left.\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+},\left[\mathrm{Ni}(\mathrm{en})_3\right)\right]^{2+},\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$ and $\left[...
MCQ+4 / -12026
35Coordination Compounds
Identify the metal ions among $\mathrm{Co^{2+}}$, $\mathrm{Ni^{2+}}$, $\mathrm{Fe^{2+}}$, $\mathrm{V^{3+}}$ and $\mathrm{Ti^{2+}}$ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the high ...
INTEGER+4 / -12026
36Coordination Compounds
Given below are two statements :Statement I : Crystal Field Stabilization Energy (CFSE) of [Cr(H2O)6]2+ is greater than that of [Mn(H2O)6]2+.Statement II : Potassium ferricyanide has a greater spin-only magnetic moment than sodium ferrocyan...
MCQ+4 / -12026
37Coordination Compounds
Given below are two statements:Statement I: A homoleptic octahedral complex, formed using monodentate ligands, will not show stereoisomerism.Statement II: cis- and trans- platin are heteroleptic complexes of Pd.In the light of the above sta...
MCQ+4 / -12025
38Coordination Compounds
The number of species from the following that are involved in sp3d2 hybridization is :[Co(NH3)6]3+, SF6, [CrF6]3−, [CoF6]3−, [Mn(CN)6]3−, and [MnCl6]3−
MCQ+4 / -12025
39Coordination Compounds
Match the LIST-I with LIST-IItable {width: 100%;border-collapse: collapse;margin: 20px 0;}th {background-color: blue;color: white;border: 1px solid lightgrey;padding: 10px;}td {border: 1px solid lightgrey;padding: 10px;text-align: left;}LIS...
MCQ+4 / -12025
40Coordination Compounds
The number of paramagnetic complexes among $\left[\mathrm{FeF}_6\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$, $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-},...
INTEGER+4 / -12025
41Coordination Compounds
An octahedral complex having molecular composition $\mathrm{Co} \cdot 5 \mathrm{NH}_3 \cdot \mathrm{Cl}^2 . \mathrm{SO}_4$ has two isomers A and B. The solution of A gives a white precipitate with $\mathrm{AgNO}_3$ solution and the solution...
MCQ+4 / -12025
42Coordination Compounds
The number of paramagnetic metal complex species among $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+},\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$, $\left[\mathrm{MnCl}_6\right]^{3-},\left[\mathrm{Mn}(\...
INTEGER+4 / -12025
43Coordination Compounds
'X' is the number of acidic oxides among VO2, V2O3, CrO3, V2O5 and Mn2O7. The primary valency of cobalt in [Co(H2NCH2CH2NH2)3]2(SO4)3 is Y. The value of X + Y is _________.
MCQ+4 / -12025
44Coordination Compounds
The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively : [Fe(CN)6]3−, [FeF6]3−, [CoF6]3−, [Mn(CN)6]3−
MCQ+4 / -12025
45Coordination Compounds
Match List - I with List - II.
List - I (Complex)
List - II (Primary valency and Secondary valency)
(A) [Co(en)2Cl2]Cl
(I) 3, 6
(B) [Pt(NH3)2Cl(NO2)]
(II) 3, 4
(C) Hg [Co(SCN)4]
(II...
List - I (Complex)
List - II (Primary valency and Secondary valency)
(A) [Co(en)2Cl2]Cl
(I) 3, 6
(B) [Pt(NH3)2Cl(NO2)]
(II) 3, 4
(C) Hg [Co(SCN)4]
(II...
MCQ+4 / -12025
46Coordination Compounds
Number of stereoisomers possible for the complexes, $\left[\mathrm{CrCl}_3(\mathrm{py})_3\right]$ and $\left[\mathrm{CrCl}_2(\mathrm{ox})_2\right]^{3-}$ are respectively
$(p y=$ pyridine,$o x=$ oxalate $)$
$(p y=$ pyridine,$o x=$ oxalate $)$
MCQ+4 / -12025
47Coordination Compounds
Which one of the following complexes will have $\Delta_{\mathrm{o}}=0$ and $\mu=5.96$ B.M?
MCQ+4 / -12025
48Coordination Compounds
A metal complex with a formula $\mathrm{MCl}_4 \cdot 3 \mathrm{NH}_3$ is involved in $\mathrm{sp}^3 \mathrm{~d}^2$ hybridisation. It upon reaction with excess of $\mathrm{AgNO}_3$ solution gives ' $x$ ' moles of AgCl . Consider ' $x$ ' is e...
INTEGER+4 / -12025
49Coordination Compounds
The correct order of $\left[\mathrm{FeF}_6\right]^{3-},\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ complex species based on the number of unpaired electrons pr...
MCQ+4 / -12025
50Coordination Compounds
' $X$ ' is the number of electrons in $t_{2 g}$ orbitals of the most stable complex ion among $\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_6\right]^{3+},\left[\mathrm{FeCl}_6\right]^{3-}, \quad\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_...
MCQ+4 / -12025