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Q. No.A pink-colored cobalt complex, denoted as (X), exists in aqueous solution. Upon reacting with concentrated HCl, it forms a deep blue-colored complex (Y). What are the identities of (X) and (Y), and what is the geometry of complex (Y), denoted as (Z)?
1. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{CoCl}_6\right]^{3-}, \text {Octahedral} \)
2. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{CoCl}_4\right]^{2-}, \text {Tetrahedral} \)
3. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{CoCl}_4\right]^{2-}, \text {Tetrahedral } \)
4. \(\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+},\left[\mathrm{CoCl}_6\right]^{3-}, \text {Octahedral} \)
Subtopic: VBT, CFT & their Limitations |
From NCERT
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Type of isomerism exhibited by compounds
[Cr(H2O)6]Cl3, [Cr(H2O)5Cl]Cl2.H2O,
[Cr(H2O)4Cl2]Cl.2H2O and the value of coordination number (CN) of central metal ion in all these compounds, respectively, is:
1. Geometrical isomerism, CN = 2
2. Optical isomerism, CN = 4
3. Ionisation isomerism, CN = 4
4. Solvate isomerism, CN = 6
[Cr(H2O)6]Cl3, [Cr(H2O)5Cl]Cl2.H2O,
[Cr(H2O)4Cl2]Cl.2H2O and the value of coordination number (CN) of central metal ion in all these compounds, respectively, is:
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 |
85%
From NCERT
NEET - 2023
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A diamagnetic compound among the following is:
1. [Co(F6)]3–
2. [Ni(CN)4]2–
3. [NiCl4]2–
4. [Fe(CN)6]3–
1. [Co(F6)]3–
2. [Ni(CN)4]2–
3. [NiCl4]2–
4. [Fe(CN)6]3–
Subtopic: VBT, CFT & their Limitations |
81%
From NCERT
NEET - 2013
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The correct IUPAC name for [CrF2(en)2]Cl is:
| 1. | Chlorodifluoridoethylenediaminechromium(III) chloride |
| 2. | Bis-(ethylenediamine)difluoridochromium(III) chloride |
| 3. | Difluorobis-(ethylenediamine)chromium(III) chloride |
| 4. | Chlorodifluoridobis(ethylenediamine)chromium (III) |
Subtopic: Introduction, Classification and Nomenclature |
81%
From NCERT
NEET - 2013
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Consider the following statements:
Which of the above statements are correct?
| A. | Carnallite (KCl.MgCl2.6H2O) is an example of double salt. |
| B. | Thiocyanato ligand behaves as an ambidentate ligand. |
| C. | [CoF6]3- is called a spin-free complex. |
| 1. | A and B | 2. | B and C |
| 3. | A and C | 4. | A, B, and C |
Subtopic: Introduction, Classification and Nomenclature |
54%
From NCERT
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Match List-I with List-II :
Choose the correct answer from the options given below:
| 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 |
| (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 |
87%
From NCERT
NEET - 2022
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The \(\Delta_0\) value of \([Ni(H_2O)_6]^{2+}\) is \(8500 ~cm^{-1}\) . The \(\Delta_0\) values for \([NiCl_6]^{4-}\) and \([Ni(NH_3)_6]^{2+}\) compared to \([Ni(H_2O)_6]^{2+}\)are:
1. Higher and lower, respectively
2. Lower and higher, respectively
3. Higher in both complex ions
4. Lowering both complex ions
1. Higher and lower, respectively
2. Lower and higher, respectively
3. Higher in both complex ions
4. Lowering both complex ions
Subtopic: VBT, CFT & their Limitations |
77%
From NCERT
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Two isomers X and Y with the formula Cr(H2O)5ClBr2 were taken for an experiment on depression in the freezing point. It was found that one mole of X gave depression corresponding to 2 moles of particles and one mole of Y gave depression due to 3 moles of particles. The structural formula of X and Y respectively, are:
1. [Cr(H2O)5Cl] Br2; [Cr(H2O)4Br2]Cl.H2O
2. [Cr(H2O)5Cl] Br2; [Cr(H2O)3ClBr2].2H2O
3. [Cr(H2O)5Br]BrCl; [Cr(H2O)4ClBr]Br.H2O
4. [Cr(H2O)4Br2]ClH2O; [Cr(H2O)5Cl]Br2
Subtopic: Werner’s Theory |
69%
From NCERT
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Identify the outer orbital complex among the following options.
(Atomic number Mn=25, Fe=26, Co=27, Ni=28)
1. [Fe(CN)6]4-
2. [Mn(CN)6]4-
3. [Co(NH3)6]3+
4. [Ni(NH3)6]2+
Subtopic: VBT, CFT & their Limitations |
76%
From NCERT
JEE
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Match the complexes from List-I with their corresponding type of isomerism from List-II:
Choose the correct from the options given below:
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
| 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 from the options given below:
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%
From NCERT
NEET - 2024
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