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Year: 2024
Topic: Coordination Compounds
1.
Given below are two statements:
Statement I: Both \([\text{Co}\left(\text{NH}_3\right)_6]^{3+}\) and \([\text{CoF}_6]^{3-}\) complexes are octahedral but differ in their magnetic behavior.
Statement II: \([\text{Co}\left(\text{NH}_3\right)_6]^{3+}\) is diamagnetic whereas \([\text{CoF}_6]^{3-}\) is paramagnetic .
In the light of the above statements, Choose the correct answer form the options given below
(1).
Statement I is true but Statement II is false.
(2).
Statement I is false but Statement II is true.
(3).
Both Statement I and Statement II are true.
(4).
Both Statement I and Statement II are false.

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Solution
Year: 2021
Topic: Coordination Compounds
2.
Match List-I with List-II

Choose the correct answer from the options given below
(1).
(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
(2).
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
(3).
(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
(4).
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)

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Solution
Year: 2018
Topic: Coordination Compounds
3.
Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code
(1).
(a) - (iii), (b) - (v), (c) - (i), (d) - (ii)
(2).
(a) - (iv), (b) - (i), (c) - (ii), (d) - (iii)
(3).
(a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)
(4).
(a) - (iv), (b) - (v), (c) - (ii), (d) - (i)

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Solution
Year: 2018
Topic: Coordination Compounds
4.
The geometry and magnetic behaviour of the complex [Ni(CO)4] are
(1).
tetrahedral geometry and paramagnetic.
(2).
square planar geometry and paramag-netic.
(3).
tetrahedral geometry and diamagnetic.
(4).
square planar geometry and diamagnetic.

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Solution
Year: 2017
Topic: Coordination Compounds
5.
Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is
(1).
[Co(NH3)6 ]3+, [Co(en)3]3+, [Co(H2O)6]3+
(2).
[Co(en)3)]3+, [Co(NH3)6 ]3+, [Co(H2O)6]3+
(3).
[Co(H2O)6]3+, [Co(en)3)]3+, [Co(NH3)6 ]3+
(4).
[Co(H2O)6]3+, [Co(NH3)6 ]3+, [Co(en)3)]3+

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Solution
Year: 2017
Topic: Coordination Compounds
6.
HgCl2 and I 2 both when dissolved in water containing I- ions, the pair ofspecies formed is
(1).
Hg2I2, I-
(2).
HgI2, I3-
(3).
HgI2, I-
(4).
HgI42-, I3-

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Solution
Year: 2025
Topic: Coordination Compounds
7.
The correct order of the wavelength of light absorbed by the following complexes is,
A. \([Co\left(NH_3\right)_6]^{3+}\)
B. \([Co\left(CN\right)_6]^{3-}\)
C. \([Cu\left(H_2O\right)_4]^{2+}\)
D. \([Ti \left(H_2O \right)_6 ]^{3+}\)
Choose the correct answer from the options given below:
(1).
C < A < D < B
(2).
B < D < A < C
(3).
B < A < D < C
(4).
C < D < A < B.

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Solution
Year: 2025
Topic: Coordination Compounds
8.
Out of the following complex compounds, which of the compound will be having the minimum conductance in solution?
(1).
\([\text{Co}\left(\text{NH}_3\right)_5 CI]CI\)
(2).
\([\text{Co}\left(\text{NH}_3\right)_5 CI_3]\)
(3).
\([\text{Co}\left(\text{NH}_3\right)_4 CI_2]\)
(4).
\([\text{Co}\left(\text{NH}_3\right)_56CI_3]\)

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Solution
Year: 2025
Topic: Coordination Compounds
9.
Which of the following are paramagnetic?
A. \([\text{NICI}_4]^{2-}\)
B. \(\text{Ni(CO)}_4\)
C. \([\text{NICN}_4]^{2-}\)
D. \([\text{NI(H)}_2\text{O)}_6]^{2+}\)
E. \(\text{Ni(PPh}_3\text{)}_4\)
Choose the correct answer from the options given below:
(1).
A, D and E only
(2).
A and C only
(3).
B and E only
(4).
A and D only

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Solution
Year: 2024
Topic: Coordination Compounds
10.
During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of \(Fe^{2+}\) ion
(1).
Dilute nitric acid
(2).
Dilute sulphuric acid
(3).
Dilute hydrochloric acid
(4).
Concentrated sulphuric acid

Test
Solution
Year: 2024
Topic: Coordination Compounds
11.
Statement I:
\([\text{Co}\left(\text{NH}_3\right)_6]^{3+}\) is a homoleptic complex where as \([\text{Co}\left(\text{NH}_3\right)_4]\text{Cl}_2]^+\) is a heteroleptic complex.
Statement II:
Complex \([\text{Co}\left(\text{NH}_3\right)_6]^{3+}\) has only one kind of ligands but \([\text{Co}\left(\text{NH}_3\right)_4]\text{Cl}_2]^+\) has more than one kind of ligands.
In the light of the above statements, CVhoose the correct answer from the options given below
(1).
Statement I is true but Statement II is false.
(2).
Statement I is false but Statement II is true.
(3).
Both Statement I and Statement II are true.
(4).
Both Statement I and Statement II are false.

Test
Solution
Year: 2024
Topic: Coordination Compounds
12.
Match List-I with List-II

Choose the correct answer from the options given below:
(1).
A - I , B - IV , C - III , D - II
(2).
A - II , B - IV , C - III , D - I
(3).
A - II , B - III , C - IV , D - I
(4).
A - I , B - III , C - IV , D - II

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Solution
Year: 2023
Topic: Coordination Compounds
13.
Homoleptic complex from the following complex is:
(1).
Diamminechloridonitrito-N-platinum (II)
(2).
Pentaamminecarbonatocobalt (III) chloride
(3).
Triamminetriaquachromium (III) chloride
(4).
Potassium trioxalatoaluminate (III)

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Solution
Year: 2023
Topic: Coordination Compounds
14.
Which complex compound is most stable?
(1).
(2).
(3).
(4).

Test
Solution
Year: 2022
Topic: Coordination Compounds
15.
The IUPAC name of the complex - [Ag(H2O)2] [Ag(CN)2] is :
(1).
dicyanido silver(II) diaqua argentate(II)
(2).
diaqua silver(II) dicyanido argentate(II)
(3).
dicyanido silver(I) diaqua argentate(I)
(4).
diaqua silver(I) dicyanido argentate(I)

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Solution
Year: 2022
Topic: Coordination Compounds
16.
The order of energy absorbed which is responsiblefor the color of complexes
(1).
[A] > [B] > [C]
(2).
[C] > [B] > [A]
(3).
[C] > [A]> [B]
(4).
[B] > [A] > [C]

Test
Solution
Year: 2021
Topic: Coordination Compounds
17.
Ethylene diaminetetraacetate (EDTA) ion is :
(1).
Hexadentate ligand with four 'O and two N donor atoms
(2).
Unidentate ligand
(3).
Bidentate ligand with two N donor atoms
(4).
Tridentate ligand with three N donor atoms

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Solution
Year: 2020
Topic: Coordination Compounds
18.
Urea reacts with water to form A which will decompose to form B. B when passed through Cu2+ (aq), deep blue colour solution C is formed. What is the formula of C from the following ?
(1).
[Cu(NH3)4]2+
(2).
Cu(OH)2
(3).
CuCO3Cu(OH)2
(4).
Cuso4

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Solution
Year: 2020
Topic: Coordination Compounds
19.
Which of the following is the correct order of increasing field strength of ligands to form coordination compounds ?
(1).
SCN- < F- < CN- < C2O42-
(2).
F- < SCN- < C2O42- < CN-
(3).
CN- < C2O42- < SCN- < F-
(4).
SCN- < F- < C2O42- < CN-

Test
Solution
Year: 2019
Topic: Coordination Compounds
20.
What is the correct electronic configuration of the central atom in K4[Fe(CN)6] based on crystal field theory?
(1).
\(\text{t}^6_{2g} \text{e}^0_g\)
(2).
\(\text{e}^3 \text{t}^3_2\)
(3).
\(\text{e}^4 \text{t}^2_2\)
(4).
\(\text{t}^4_{2g} \text{e}^2_g\)

Test
Solution
Year: 2018
Topic: Coordination Compounds
21.
Iron carbonyl, Fe(CO) 5 is
(1).
Dinuclear
(2).
Trinuclear
(3).
Mononuclear
(4).
Tetranuclear

Test
Solution
Year: 2018
Topic: Coordination Compounds
22.
Which one of the following ions exhibits d-d transition and paramagnetism as well ?
(1).
\(\text{MnO}_4^{2-}\)
(2).
\(\text{MnO}_4^{-}\)
(3).
\(\text{Cr}_2 \text{O}_7^{2-}\)
(4).
\(\text{CrO}_4^{2-}\)

Test
Solution
Year: 2018
Topic: Coordination Compounds
23.
The type of isomerism shown by the complex [CoCl2(en)2] is
(1).
linkage isomerism
(2).
ionization isomerism
(3).
coordination isomerism
(4).
geometrical isomerism

Test
Solution
Year: 2017
Topic: Coordination Compounds
24.
Pick out the correct statement with respect to [Mn(CN)6]3–
(1).
It is dsp2 hybridized and square planar.
(2).
It is sp3d2 hybridized and octahedral.
(3).
It is sp3d2 hybridized and tetrahedral.
(4).
It is d2sp3 hybridized and octahedral.

Test
Solution
Year: 2017
Topic: Coordination Compounds
25.
The correct order of the stoichiometries of AgCl formed when AgNO3 in excess istreated with the complexes:
CoCl3.6NH3, CoCl3.5NH3, CoCl3 .4NH3 respectively is
(1).
2 AgCl, 3 AgCl, 1 AgCl
(2).
1 AgCl, 3 AgCl, 2 AgCl
(3).
3 AgCl, 1 AgCl, 2 AgCl
(4).
3 AgCl, 2 AgCl, 1 AgCl

Test
Solution
Year: 2017
Topic: Coordination Compounds
26.
An example of a sigma bonded organometallic compound is
(1).
cobaltocene.
(2).
ruthenocene.
(3).
grignard's reagent.
(4).
ferrocene.

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Solution