The correct increasing order for the wavelengths of absorption in complexes of Co3+ is:

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

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

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

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

Subtopic:  VBT, CFT & their Limitations |
 56%
From NCERT
NEET - 2017
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The correct increasing order of trans-effect of the following species is:

1.  NH3>CN->Br>C6H5-

2.  CN->C6H5->Br->NH3

3.  Br->CN->NH3>C6H-5

4.  CN->Br->C6H-5>NH3

Subtopic:  Ligands |
 70%
NEET - 2016
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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 |
 70%
NEET - 2016
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The correct statement among the following regarding [Mn(CN)6]3-is:

1. It is sp3d2 hybridized and tetrahedral.

2. It is d2sp3 hybridized and octahedral.

3. It is dsp2 hybridised and square planar.

4. It is sp3d2 hybridised and octahedral.

Subtopic:  VBT, CFT & their Limitations |
 78%
From NCERT
NEET - 2017
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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 |
 79%
From NCERT
NEET - 2018
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Iron carbonyl, FeCO5, is classified as:

1. Tetranuclear 2. Mononuclear
3. Trinuclear 4. Dinuclear
Subtopic:  Organometallic Complexes & their Uses |
 78%
From NCERT
NEET - 2018
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Which of the following has the longest C ­—O bond length? (Free C—O bond length in CO is 1.128 Å)

1. [Co(CO)4]-
2. [Fe(CO)4]2-
3. Mn(CO)6]+
4. Ni(CO)4
Subtopic:  VBT, CFT & their Limitations |
 77%
NEET - 2016
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An example of a sigma bonded organometallic compound is:

1. Grignard's reagent

2. Ferrocene

3. Cobaltocene

4. Ruthenocene

Subtopic:  Organometallic Complexes & their Uses |
 86%
NEET - 2017
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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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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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