The coordination number of a central metal atom in a complex is determined by

1. The number of ligands around a metal ion bonded by sigma and pi-bonds both

2. The number of ligands around a metal ion bonded by pi-bonds

3. The number of ligands around a metal ion bonded by sigma bonds

4. The number of only anionic ligands bonded to the metal ion

Subtopic:  Introduction, Classification and Nomenclature |
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Which one of the following complexes is an outer orbital complex :-

1. [Co(NH3)6]3+

2. [Mn(CN)6]4-

3. [Fe(CN)6]4-

4. [Ni(NH3)6]2+

(Atomic nos.:Mn=25 ; Fe=26 ; Co=27 ; Ni = 28)

Subtopic:  VBT, CFT & their Limitations |
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The IUPAC name for the complex [Co(NO2) (NH3)5 ]Cl2 is

1. Pentaammine nitrito-N- cobalt (II) chloride

2. Pentaammine nitrito-N- cobalt (III) chloride

3. Nitrito-N- pentaamminecobalt (III) chloride

4. Nitrito-N- pentaamminecobalt (II) chloride

Subtopic:  Introduction, Classification and Nomenclature |
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Which among the following complexes can exhibit isomerism?

1. [Ag(NH3)2]+ 2. [Co(NH3)5NO2]2+
3. [Pt(en)Cl2] 4. [Co(NH3)5Cl]+

Subtopic:  Isomerism in Coordination Compounds |
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CrNH35BrCl and CrNH35ClBr  can be distinguished by/and isomerism shown is:

1. BaCl2, ionisation

2. AgNO3, ionisation

3. AgNO3, coordinate

4. BaCl2, linkage

Subtopic:  Isomerism in Coordination Compounds |
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FeIIClCN4O24- is named as:

1. Chlorotetracyanodioxoferrate (II) ion

2. Chlorotetracyanoperoxoferrate (II) ion

3. Chlorotetracyanosuperoxoferrate (II) ion

4. None of the correct

Subtopic:  Introduction, Classification and Nomenclature |
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Geometrical isomerism in coordination compunds is exhibited by
1. Square planar and tetrahedral complexes
2. Square planar and octahedral complexes
3. Tetrahedral and octahedral complexes
4. Squre planar, tetrahedral and octahedral complexes

Subtopic:  Isomerism in Coordination Compounds |
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Which of the following is not optically active?

1. Coen33+

2. Crox33-

3. cis-CoCl2en2+

4. trans-CoCl2en2+

Subtopic:  Isomerism in Coordination Compounds |
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Arrange the following in order of decreasing number of unpaired electrons:

(I) FeH2O62+  (II) FeCN63-

(III) FeCN64-  (IV) FeH2O63+

1. IV, I, II, III

2. I, II, III, IV

3. III, II, I, IV

4. II, III, I, IV

Subtopic:  VBT, CFT & their Limitations |
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Of the following complex ions, the one that probably has the largest overall formation constant,
Kf , is

1. CoNH363+

2. CoH2O63+

3. CoH2O4NH323+

4. Coen33+

Subtopic:  VBT, CFT & their Limitations |
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