Match List I with List II:
List-I List-II
A. \([{Pt(NH_3)_2Cl_2}]\) I. Optical
B. \([Co(en)_3]^{3+}\) II. Solvate
C. \([Co(NH_3)_5NO_2]Cl_2\) III. Geometrical
D. \([Cr(H_2O)_6]Cl_3\) IV. Linkage

Choose the correct answer from the options given below:
1. A-III, B-I, C-II, D-IV
2. A-I, B-III, C-II, D-IV
3. A-III, B-I, C-IV, D-II
4. A-II, B-IV, C-III, D-I
Subtopic:  Isomerism in Coordination Compounds |
 78%
Level 2: 60%+
NEET - 2026
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Given below are two statements:
Statement-I: [Fe(ox)3]3- is chiral.
Statement-II: trans-[Cr(H2O)2(ox)2]- is chiral.

(Given \(\left.\mathrm{oxH}_2=\mathrm{HOOC}-\mathrm{COOH}\right)\)
In light of the above statements, choose the most appropriate answer from the options given below:
 
1. Statement-I is incorrect but Statement-II is correct.
2. Both Statement-I and Statement-II are correct.
3. Both Statement-I and Statement-II are incorrect.
4. Statement-I is correct but Statement-II is incorrect.
Subtopic:  Isomerism in Coordination Compounds |
Level 4: Below 35%
NEET - 2026
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The complex which has facial and meridional isomers is:
(Given : py = pyridine and en = H2N-CH2-CH2-NH2)
1. [Ni(en)2(H2O)2]2+
2. [Cr(py)3(Cl)3]
3. [Cr(H2O)6]3+
4. [Co(NH3)4(H2O)2]3+
Subtopic:  Isomerism in Coordination Compounds |
 56%
Level 3: 35%-60%
NEET - 2026
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A 1:3 electrolyte in an aqueous solution is :
1. \([Co(NH_3)_3(NO_2)_3]\)
2. \([CoCl_2(NH_3)_4]Cl\)
3. \([CoCl(NH_3)_5]Cl_2\)
4. \([Co(NH_3)_6]Cl_3\)
Subtopic:  Isomerism in Coordination Compounds |
 60%
Level 2: 60%+
NEET - 2026
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Match the complexes from List-I with their corresponding type of isomerism from List-II:
List-I (Complex) List-II
(Type of isomerism)
A. \(\mathrm{\left[{Co}\left({NH}_3\right)_5\left({NO}_2\right)\right] {Cl}_2}\) I. Solvate isomerism
B. \(\mathrm{\left[{Co}\left({NH}_3\right)_5\left({SO}_4\right)\right] {Br}}\) II. Linkage isomerism
C. \(\mathrm{\left[{Co}\left({NH}_3\right)_6\right]\left[{Cr}({CN})_6\right]}\) III. Ionization isomerism
D. \(\mathrm{\left[{Co}\left({H}_2 {O}\right)_6\right] {Cl}_3}\) IV. Coordination isomerism
Choose the correct option:
1. A-I, B-III, C-IV, D-II
2. A-I, B-IV, C-III, D-II
3. A-II, B-IV, C-III, D-I
4. A-II, B-III, C-IV, D-I
Subtopic:  Isomerism in Coordination Compounds |
 77%
Level 2: 60%+
NEET - 2024
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What is the type of isomerism exhibited by the compounds [Cr(H2O)6]Cl3, [Cr(H2O)5Cl]Cl2.H2O and [Cr(H2O)4Cl2]Cl.2H2O and the value of coordination number (CN) of central metal ion in all these compounds?

1. Geometrical isomerism, CN = 2
2. Optical isomerism, CN = 4
3. Ionisation isomerism, CN = 4
4. Solvate isomerism, CN = 6
Subtopic:  Isomerism in Coordination Compounds |
 87%
Level 1: 80%+
NEET - 2023
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Match List-I with List-II:
List-I (Complexes) List-II (Type of isomer)
A. [Co(NH3)5NO2]Cl2 and
[Co(NH3)5ONO]Cl2
I. Ionisation isomerism
B. [Cr(NH3)6] [Co(CN)6] and
[Cr(CN)6][Co(NH3)6]
II. Coordination isomerism
C. [Co(NH3)5(SO4)]Br and
[Co(NH3)5Br]SO4
III. Linkage isomerism
D. [Cr(H2O)6]Cl3 and
[Cr(H2O)5Cl]Cl2.H2O
IV. Solvate isomerism
Choose the correct answer from the options given below:
(A) (B) (C) (D)
1. (III) (I) (II) (IV)
2. (II) (III) (IV) (I)
3. (III) (II) (I) (IV)
4. (IV) (III) (II) (I)
Subtopic:  Isomerism in Coordination Compounds |
 88%
Level 1: 80%+
NEET - 2022
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The type of isomerism shown by the complex [CoCl2(en)2]+ is:
1. Geometrical isomerism 2. Coordination isomerism
3. Ionization isomerism 4. Linkage isomerism
Subtopic:  Isomerism in Coordination Compounds |
 80%
Level 1: 80%+
NEET - 2018
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The number of possible isomers for the complex \([Co (en)_ 2 Cl_ 2] 𝐶 𝑙  \) will be:
(en=ethylenediamine)

1. Two (2) 2. One (1)
3. Three (3) 4. Four (4)
Subtopic:  Isomerism in Coordination Compounds |
 62%
Level 2: 60%+
NEET - 2015
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An anticancer agent among the following is:

1. \(\text { mer} - \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}\right] \) 2. \(\text { cis -} \left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_2\right] \)
3. \(\text {cis -} \mathrm{K}_2\left[\mathrm{Pt} \mathrm{Cl}_2 \mathrm{Br}_2\right] \) 4. \(\mathrm{NH}_2 \mathrm{CoCl}_4\)
Subtopic:  Isomerism in Coordination Compounds |
 91%
Level 1: 80%+
AIPMT - 2014
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