Of the following complex ions, the diamagnetic complex is:

1. [Ni(CN)4]2-                       

2. [CuCl4]2-

3. [CoF6]3-                           

4. [NiCl4]2-

Subtopic:  VBT, CFT & their Limitations |
 89%
Level 1: 80%+
NEET - 2011
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The complexes [CO(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are examples of:

1. lonisation isomerism 2. Coordination isomerism
3. Geometrical isomerism 4. Linkage isomerism
Subtopic:  Isomerism in Coordination Compounds |
 87%
Level 1: 80%+
NEET - 2011
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The complex that does not exhibit optical isomerism is:

(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 |
 65%
Level 2: 60%+
NEET - 2009
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oct(CFSE in the octahedral field) will be maximum in:
(Atomic number Co = 27)

1. [Co(H2O)6]3+

2. [Co(NH3)6]3+

3. [Co(CN)6]3-

4. [Co(C2O4)3]3-

Subtopic:  VBT, CFT & their Limitations |
 67%
Level 2: 60%+
NEET - 2008
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[Co(NH3)4(NO2)2]Cl can show:

1. Linkage isomerism, ionization isomerism, and optical isomerism.
2. Linkage isomerism, ionization isomerism, and geometrical isomerism.
3. Ionisation isomerism, geometrical isomerism, and optical isomerism.
4. Ionisation isomerism, geometrical isomerism, and metamerism.

Subtopic:  Isomerism in Coordination Compounds |
 79%
Level 2: 60%+
NEET - 2006
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The complex that is used as an anticancer agent is:

1. mer-[Co(NH3)3Cl3]        

2. cis-[PtCl2(NH3)2]

3. cis-K2[PtCl2 Br2]           

4. Na2[CoCl4]

Subtopic:  Introduction, Classification and Nomenclature |
 87%
Level 1: 80%+
NEET - 2014
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The hybridisation of Ni in the complex [Ni(CN)4]2- is:
(Atomic number of Ni = 28)

1. dsp2 2. sp3
3. v 4. d2sp3
Subtopic:  VBT, CFT & their Limitations |
 82%
Level 1: 80%+
NEET - 2015
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The total number of possible isomers for the complex [Co(en)2Cl2]Cl are:
[en-ethylenediamine]

1. 2                         

2. 1

3. 3                         

4. 4

Subtopic:  Isomerism in Coordination Compounds |
 67%
Level 2: 60%+
NEET - 2015
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The correct statement among the following about [Co(CN)6]3- is :

1. It has no unpaired electrons and will be in a low-spin configuration
2. It has four unpaired electrons and will be in a low-spin configuration
3. It has four unpaired electrons and will be in a high-spin configuration
4. It has no unpaired electrons and will be in a high-spin configuration

Subtopic:  VBT, CFT & their Limitations |
 79%
Level 2: 60%+
NEET - 2015
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The correct order of the stoichiometrics of AgCl formed when AgNO3 in excess is treated with the complexes:- CoCl3.6NH3, CoCl3.5NH3, CoCl3.4NH3, respectively, is :

1. 1 AgCl, 3 AgCl, 2 AgCl

2. 3 AgCl, 1 AgCl, 2 AgCl

3. 3 AgCl, 2 AgCl, 1 AgCl

4. 2 AgCl, 3AgCl,  1 AgCl

Subtopic:  Werner’s Theory |
 88%
Level 1: 80%+
NEET - 2017
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