An example of a sigma bonded organometallic compound is:

1. Ruthenocene                 

2. Grignard's reagent

3. Ferrocene                     

4. Cobaltocene

Subtopic:  Ligands | VBT, CFT & their Limitations |
 85%
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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 |
 87%
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Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co3+ is : 

(1)  [Co(en)3]3+ , [Co(NH3)6]3+ , [Co(H2O)6]3+

(2)  [Co(H2O)6]3+ , [Co(en)3]3+, [Co(NH3)6]3+

(3)  [Co(H2O)6]3+[Co(NH3)6]3+[Co(en)3]3+  

(4)  [Co(NH3)6]3+,[Co(en)3]3+[Co(H2O)6]3+ 

Subtopic:  Organometallic Complexes & their Uses | Isomerism in Coordination Compounds |
 53%
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Jahn-Teller effect is not observed in high spin complexes of

1. d7

2. d8

3. d4

4. d9

Subtopic:  VBT, CFT & their Limitations |
 59%
NEET - 2016
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Which of the following has longest C-O bond length? (Free C-O bond length in CO is

1.128 Å.)

1. [Co(СО)4]-

2. [Fe(CO)4]2-

3. [Mn(CO)6]+

4. Ni(CO)4

Subtopic:  VBT, CFT & their Limitations |
 55%
NEET - 2016
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Which of the following statements is false?

1. Ca2+ ions are important in blood clotting

2. Ca2+ ions are not important in maintaining the regular beating of the heart

3. Mg2+ ions are important in the green parts of plants

4. Mg2+ ions form a complex with ATP

Subtopic:  Introduction, Classification and Nomenclature |
 74%
NEET - 2016
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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 |
 77%
From NCERT
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 |
 63%
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NEET - 2015
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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. d2sp2                             

4. d2sp3

Subtopic:  VBT, CFT & their Limitations |
 81%
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NEET - 2015
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The sum of coordination number and oxidation number of the metal M in the complex M(en)2(C2O4)]Cl (where, en is ethylenediamine) is : 

1. 9

2. 6

3. 7

4. 8

Subtopic:  Introduction, Classification and Nomenclature | Ligands |
 59%
From NCERT
NEET - 2015
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