The  complex ion that does not expected to absorb visible light is:

1. [Ni(CN)4]2-

2. [Cr(NH3)6]3+

3. [Fe(H2O)6]2+

4. [Ni(H2O)6]2+

Subtopic:  Organometallic Complexes & their Uses |
 76%
From NCERT
AIPMT - 2010
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The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+is due to:

1. Linkage isomerism

2. Geometrical isomerism

3. Coordination isomerism

4. Ionisation isomerism

Subtopic:  Isomerism in Coordination Compounds |
 58%
From NCERT
AIPMT - 2010
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Which of the following ions doesn't exhibit optical isomerism?

(en = ethylenediamine)

1. [Co(en)2Cl2]+

2. [Co(NH3)3Cl3]

3. [Co(en)Cl2(NH3)2]+

4. [Co(en)3]3+

Subtopic:  Isomerism in Coordination Compounds |
 67%
From NCERT
AIPMT - 2009
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A complex  ion among the following can absorb visible light is:
(At. no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)

1. [Sc(H2O)3(NH3)3]3+

2. [Ti(en)2 (NH3)2]4+

3. [Cr(NH3)6]3+

4. [Zn(NH3)6]2+

Subtopic:  Introduction, Classification and Nomenclature | Ligands |
 74%
From NCERT
AIPMT - 2009
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Out of TiF62-CoF63-, Cu2Cl2 and NiCl42-(Z of Ti = 22, Co=27, Cu = 29, Ni= 28) the colourless species are:

1. TiF62- and CoF63-

2. Cu2Cl2 and NiCl42-

3. TiF62- and Cu2Cl2

4. CoF63- and NiCl42-

Subtopic:  Introduction, Classification and Nomenclature |
 76%
From NCERT
AIPMT - 2009
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Which of the following complexes has the highest paramagnetic behaviour?

(where gly = glycine, en = ethylenediamine, ox = oxalate ion and bpy = bipyridyl moieties )
(At no : Ti= 22, V = 23, Fe = 26, Co = 27)

1. [V(gly)2(OH)2(NH3)2]+

2. [Fe(en)(bpy)(NH3)2]2+

3.  [Co(ox)2(OH)2]-

4. [Ti(NH3)6]3+

Subtopic:  Ligands | VBT, CFT & their Limitations |
 51%
From NCERT
AIPMT - 2008
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CFSE (in the octahedral field) will be maximum in:
(Atomic number Co = 27)

1. CoH2O63+

2. CoNH363+

3. CoCN63-

4. CoC2O433-

Subtopic:  Ligands |
 68%
From NCERT
AIPMT - 2008
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The compound that gives a pair of enantiomorphs is:
(en = NH2 CH2CH2 NH2)

1. [Co(NH3)4Cl2]NO2

2. [Cr(NH3)6][Co(CN)6]

3. [Co(en)2Cl2]Cl

4. [Pt(NH3)4][PtCl6]

Subtopic:  Isomerism in Coordination Compounds |
 73%
From NCERT
AIPMT - 2007
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Copper sulphate dissolves in excess of KCN to give:

1. CuCN

2. [Cu(CN)4]3-

3. [Cu(CN)4]2-

4. Cu(CN)2

Subtopic:  Introduction, Classification and Nomenclature |
AIPMT - 2006
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A pair that contains both the ions coloured in an aqueous solution is:

(At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

1. \(N i^{2+}, T i^{3+} \) 2. \(S c^{3+}, T i^{3+} \)
3. \(\mathrm{Sc}^{3+}, \mathrm{Co}^{2+} \) 4. \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{+}\)
Subtopic:  VBT, CFT & their Limitations |
 73%
From NCERT
AIPMT - 2006
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