Coordination, Organometallic Bioinorganic _1_ | Additional Documents & Tests for IIT JAM PDF Download

 Page 1


 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
Mob. 011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com 
 
 
Coordination, Organometalic, Bio-Inorganic,Transition Metal (d-Block)  
Online Test (28
th
, Dec/16) 
1. The correct order of magnetic moments (spin only values in B.M.) among following is: 
 (a) [MnCl
4
]
2-
 > [CoCl
4
]
2-
 > [Fe(CN)
6
]
4-
 (b) [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 > [MnCl
4
]
2- 
 (c) [Fe(CN)
6
]
4-
 > [MnCl
4
]
2-
 > [CoCl
4
]
2-
 (d) [MnCl
4
]
2-
 > [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 
2. Which of the following complex is heteroleptic: 
 (a) [Co(NH
3
)
6
]
 
 (b) [Fe(CN)
6
]
3-
 (c) [CoCl(NH
3
)]
2+
 (d) [Ni(CO)
4
] 
3. Which of the following has highest conductivity? 
 (a) [Co(NH
3
)
6
]Cl
3
 (b) K
2
[PtCl
6
]  (c) K
4
[Fe(CN)
6
] (d) [Co(NH
3
)
3
(NO
2
)
3
] 
4. Among the following, the unstable carbonyl species is: 
 (a) Mn(CO)
5
Cl (b) [Mn(CO)
5
]
-
 (c) [Mn(CO)
5
]
+
 (d) Mn(CO)
5
 
5. The oxidation state of molybdenum in [(?
7
 –tropylium) Mo(CO)
3
]
+
 is: 
 (a) +2   (b) +1   (c) 0   (d) -1 
6. Mg
2+
 is preferred in photosynthesis by chlorophyll because: 
 (a) It has strong spin-orbit coupling.  (b) It has weak spin-orbit coupling.  
 (c) It is heavy metal.     (d) It binds strongly with chlorophyll. 
7. The room temperature magnetic moment (µ
eff
 in BM) for a monomeric Cu (II) complex is greater 
than 1.73. This may be explain using the expression: 
 (a)    (b)  
 (c)     (d)   
8. The ground state term symbols for high spin d
5
s
1
 and d
5
-configuration, respectively, are:      
 (a) 
3
s and 
6
s  (b) 
6
p and 
3
s  (c) 
7
s and 
6
s  (d) 
7
p and 
6
s 
9. Among the following, the correct combination of complex and its color is: 
 (a) [Co(CN)
2
]
2–    
Red    (b) [CoCl
4
]
2–         
Orange  
(c) [Co(SCN)
4
]
2–    
Blue    (d) [CoF
4
]
2–          
Yellow 
10. Storage of iron in the body is carried out by:  
 (a) Hemoglobin     (b) Ferritin    
(c) Cytochrome p-450     (d) Myoglobin  
11. Using crystal field theory, identify from the following complex ions that shows same µ
eff
 (spin 
only) value: 
Page 2


 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
Mob. 011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com 
 
 
Coordination, Organometalic, Bio-Inorganic,Transition Metal (d-Block)  
Online Test (28
th
, Dec/16) 
1. The correct order of magnetic moments (spin only values in B.M.) among following is: 
 (a) [MnCl
4
]
2-
 > [CoCl
4
]
2-
 > [Fe(CN)
6
]
4-
 (b) [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 > [MnCl
4
]
2- 
 (c) [Fe(CN)
6
]
4-
 > [MnCl
4
]
2-
 > [CoCl
4
]
2-
 (d) [MnCl
4
]
2-
 > [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 
2. Which of the following complex is heteroleptic: 
 (a) [Co(NH
3
)
6
]
 
 (b) [Fe(CN)
6
]
3-
 (c) [CoCl(NH
3
)]
2+
 (d) [Ni(CO)
4
] 
3. Which of the following has highest conductivity? 
 (a) [Co(NH
3
)
6
]Cl
3
 (b) K
2
[PtCl
6
]  (c) K
4
[Fe(CN)
6
] (d) [Co(NH
3
)
3
(NO
2
)
3
] 
4. Among the following, the unstable carbonyl species is: 
 (a) Mn(CO)
5
Cl (b) [Mn(CO)
5
]
-
 (c) [Mn(CO)
5
]
+
 (d) Mn(CO)
5
 
5. The oxidation state of molybdenum in [(?
7
 –tropylium) Mo(CO)
3
]
+
 is: 
 (a) +2   (b) +1   (c) 0   (d) -1 
6. Mg
2+
 is preferred in photosynthesis by chlorophyll because: 
 (a) It has strong spin-orbit coupling.  (b) It has weak spin-orbit coupling.  
 (c) It is heavy metal.     (d) It binds strongly with chlorophyll. 
7. The room temperature magnetic moment (µ
eff
 in BM) for a monomeric Cu (II) complex is greater 
than 1.73. This may be explain using the expression: 
 (a)    (b)  
 (c)     (d)   
8. The ground state term symbols for high spin d
5
s
1
 and d
5
-configuration, respectively, are:      
 (a) 
3
s and 
6
s  (b) 
6
p and 
3
s  (c) 
7
s and 
6
s  (d) 
7
p and 
6
s 
9. Among the following, the correct combination of complex and its color is: 
 (a) [Co(CN)
2
]
2–    
Red    (b) [CoCl
4
]
2–         
Orange  
(c) [Co(SCN)
4
]
2–    
Blue    (d) [CoF
4
]
2–          
Yellow 
10. Storage of iron in the body is carried out by:  
 (a) Hemoglobin     (b) Ferritin    
(c) Cytochrome p-450     (d) Myoglobin  
11. Using crystal field theory, identify from the following complex ions that shows same µ
eff
 (spin 
only) value: 
 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
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(A) [CoF
6
]
3–
        (B) [IrCl
6
]
3–
     (C) [Fe(H
2
O)
6
]
2+
 
(a) A and B   (b) A, B and C  (c) B and C  (d) A and C 
12. The correct order of the CO stretching vibrational frequency is:        
 (a) [Ti(CO)
6
]
2-
 > [V(CO)
6
]
-
 > CO > [Cr(CO)
6
]       
(b)  [Cr(CO)
6
] > CO > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
      
 (c) CO > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
 > [Cr(CO)
6
]  
(d) CO > [Cr(CO)
6
] > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
 
13. For the following reaction, the metal complexes X and Y are: 
 (i) 
CO(g)
1 atm / 25 C
Ni(s) (X)
?
? ? ? ? ? ? ,   (ii) 
5 5
2NaC H
2
FeCl (Y) ? ? ? ? ? 
 (a) X = NiCO
4
 , Y = Fe(?
5
-C
5
H
5
)
2
  (b) X = Ni(CO)
4
 , Y = Fe(?
1
-C
5
H
5
)
2 
 
(c) X = Ni(CO)
5
 , Y = Fe(?
5
-C
5
H
5
)
2
  (d) X = Ni(CO)
6
 , Y = Fe(?
1
-C
5
H
5
)
2 
 
 14. The complex    follows: 
  
(a) 18e rule and stable     
(b) 16e
-
 rule and unstable 
 (c) 18e
-
 rule and thermodynamically unstable 
 (d) 16e
-
 rule and stable.  
15. The spinels CoFe
2
O
4
 and FeFe
2
O
4, 
respectively are: 
 (a) Inverse and inverse    (b) Inverse and normal 
 (c) Normal and normal    (d) Normal and inverse 
16. In the transformation of oxyhemoglobin to deoxyhemoglobin. Incorrect statement are: 
 (a) Fe
2+
 in low spin state changes to Fe
+2
 in high spin state. 
 (b) Fe
2+
 in low spin state changes to Fe
+3
 in low spin state. 
 (c) Fe
2+
 in high spin state changes to Fe
+2
 in low spin state. 
 (d) Fe
2+
 in high spin state changes to Fe
+2
 in high spin state. 
17. Which of the statements concerning transition metal alkene complexes is correct: 
 (a) Bonding between metal atom and alkene is synergic. 
 (b) A metal atoms must possess an empty p
z
 and d
z
2
 orbitals and filled 2 2
x y
d
?
 
 (c) Alkenes can also behave as divalent bidentate chelating agents in some complexes.  
 (d) C
2
H
4
 group is not planar in its complexes with transition metals.  
Page 3


 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
Mob. 011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com 
 
 
Coordination, Organometalic, Bio-Inorganic,Transition Metal (d-Block)  
Online Test (28
th
, Dec/16) 
1. The correct order of magnetic moments (spin only values in B.M.) among following is: 
 (a) [MnCl
4
]
2-
 > [CoCl
4
]
2-
 > [Fe(CN)
6
]
4-
 (b) [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 > [MnCl
4
]
2- 
 (c) [Fe(CN)
6
]
4-
 > [MnCl
4
]
2-
 > [CoCl
4
]
2-
 (d) [MnCl
4
]
2-
 > [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 
2. Which of the following complex is heteroleptic: 
 (a) [Co(NH
3
)
6
]
 
 (b) [Fe(CN)
6
]
3-
 (c) [CoCl(NH
3
)]
2+
 (d) [Ni(CO)
4
] 
3. Which of the following has highest conductivity? 
 (a) [Co(NH
3
)
6
]Cl
3
 (b) K
2
[PtCl
6
]  (c) K
4
[Fe(CN)
6
] (d) [Co(NH
3
)
3
(NO
2
)
3
] 
4. Among the following, the unstable carbonyl species is: 
 (a) Mn(CO)
5
Cl (b) [Mn(CO)
5
]
-
 (c) [Mn(CO)
5
]
+
 (d) Mn(CO)
5
 
5. The oxidation state of molybdenum in [(?
7
 –tropylium) Mo(CO)
3
]
+
 is: 
 (a) +2   (b) +1   (c) 0   (d) -1 
6. Mg
2+
 is preferred in photosynthesis by chlorophyll because: 
 (a) It has strong spin-orbit coupling.  (b) It has weak spin-orbit coupling.  
 (c) It is heavy metal.     (d) It binds strongly with chlorophyll. 
7. The room temperature magnetic moment (µ
eff
 in BM) for a monomeric Cu (II) complex is greater 
than 1.73. This may be explain using the expression: 
 (a)    (b)  
 (c)     (d)   
8. The ground state term symbols for high spin d
5
s
1
 and d
5
-configuration, respectively, are:      
 (a) 
3
s and 
6
s  (b) 
6
p and 
3
s  (c) 
7
s and 
6
s  (d) 
7
p and 
6
s 
9. Among the following, the correct combination of complex and its color is: 
 (a) [Co(CN)
2
]
2–    
Red    (b) [CoCl
4
]
2–         
Orange  
(c) [Co(SCN)
4
]
2–    
Blue    (d) [CoF
4
]
2–          
Yellow 
10. Storage of iron in the body is carried out by:  
 (a) Hemoglobin     (b) Ferritin    
(c) Cytochrome p-450     (d) Myoglobin  
11. Using crystal field theory, identify from the following complex ions that shows same µ
eff
 (spin 
only) value: 
 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
Mob. 011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com 
 
 
(A) [CoF
6
]
3–
        (B) [IrCl
6
]
3–
     (C) [Fe(H
2
O)
6
]
2+
 
(a) A and B   (b) A, B and C  (c) B and C  (d) A and C 
12. The correct order of the CO stretching vibrational frequency is:        
 (a) [Ti(CO)
6
]
2-
 > [V(CO)
6
]
-
 > CO > [Cr(CO)
6
]       
(b)  [Cr(CO)
6
] > CO > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
      
 (c) CO > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
 > [Cr(CO)
6
]  
(d) CO > [Cr(CO)
6
] > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
 
13. For the following reaction, the metal complexes X and Y are: 
 (i) 
CO(g)
1 atm / 25 C
Ni(s) (X)
?
? ? ? ? ? ? ,   (ii) 
5 5
2NaC H
2
FeCl (Y) ? ? ? ? ? 
 (a) X = NiCO
4
 , Y = Fe(?
5
-C
5
H
5
)
2
  (b) X = Ni(CO)
4
 , Y = Fe(?
1
-C
5
H
5
)
2 
 
(c) X = Ni(CO)
5
 , Y = Fe(?
5
-C
5
H
5
)
2
  (d) X = Ni(CO)
6
 , Y = Fe(?
1
-C
5
H
5
)
2 
 
 14. The complex    follows: 
  
(a) 18e rule and stable     
(b) 16e
-
 rule and unstable 
 (c) 18e
-
 rule and thermodynamically unstable 
 (d) 16e
-
 rule and stable.  
15. The spinels CoFe
2
O
4
 and FeFe
2
O
4, 
respectively are: 
 (a) Inverse and inverse    (b) Inverse and normal 
 (c) Normal and normal    (d) Normal and inverse 
16. In the transformation of oxyhemoglobin to deoxyhemoglobin. Incorrect statement are: 
 (a) Fe
2+
 in low spin state changes to Fe
+2
 in high spin state. 
 (b) Fe
2+
 in low spin state changes to Fe
+3
 in low spin state. 
 (c) Fe
2+
 in high spin state changes to Fe
+2
 in low spin state. 
 (d) Fe
2+
 in high spin state changes to Fe
+2
 in high spin state. 
17. Which of the statements concerning transition metal alkene complexes is correct: 
 (a) Bonding between metal atom and alkene is synergic. 
 (b) A metal atoms must possess an empty p
z
 and d
z
2
 orbitals and filled 2 2
x y
d
?
 
 (c) Alkenes can also behave as divalent bidentate chelating agents in some complexes.  
 (d) C
2
H
4
 group is not planar in its complexes with transition metals.  
 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
Mob. 011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com 
 
 
18. Which of the following is important for the formation of stable metal carbonyls: 
 (a) Metals with low oxidation states.  (b) Metals with small size.  
 (c) Lowering of carbon-oxygen bond order. (d) EAN is obeyed. 
19. Which of the statements on ferrocene is correct: 
 (a) Ferrocene has a staggered configuration in the solid state.  
 (b) Ferrocene has a sandwiched structure with two parallel rings.  
(c)The stability of ferrocene is attributed to strong s-bonds between iron and Cyclopentadiene 
rings.  
 (d) The Cyclopentadiene rings have been found to rotate freely in solution of ferrocene.   
20. Among the following, species expected to show fluxional behaviour are: 
 (a) [NiCl
4
]
–2
 (tetrahedral)   (b) IF
7
 (Pentagonal bipyramidal) 
 (c) [CoF
6
]
–3
 (Octahedral)   (d) Fe(Co)
5
 (Trigonal bipyramidal)
 
21. In a cluster, H
3
CoRu
3
(CO)
12 
, total number of e
–
 considered to be involved in its formation is: 
22.  The oxidation state of Fe in myoglobin is: 
23. The number of microstate in term 
1
G is: 
24. Among the following, how many number of coordination complex are paramagnetic: 
(i) [FeCl
4
]
–2
         (ii) [Cu(CN)
4
]
–3
      (iii) [Co(Cl)
4
]
–2
    
(iv) [Ni(CO)
4
]           (v) [Co(NH
3
)
6
]
+2
      (vi) [Ni(NH
3
)
6
]
+2
   
25. The complex ion [Ni(CN)
4
]
-2
 has square planer configuration with magnetic moment of zero. 
What would be magnetic moment if it were tetrahedral: 
26. Given that the crystal field stabilization energy for [Co(H
2
O)
6
]
+2
 is 7360 cm
-1
. The calculate value 
of ?
0
 in kj mol
-1
 is: 
27.  In the complex, [Ni
2
(?
5
 – CP)
2
(CO)
2
], the IR stretching frequency appear at 1857 cm
-1
 and 1870 
cm
-1
. Count the valence e
-
 of this complex: 
28. In 18 e
-
 system, the value of x in Fe
3
(CO)
x
 is: 
29. The hapticity of Cycloheptene – 1, 3, 5-triene in (C
7
H
8
) Fe(CO)
3
 is: 
30. For a complex ion [MnL
6
]
+2
, where L is a neutral mono-dentate ligand, the mean pairing energy 
(P) is found to be 28,000 cm
–1
. If the magnitude of ?
0
 is 21,000 cm
–1
. Calculate C.F.S.E is:  
 
 
 
 
Page 4


 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
Mob. 011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com 
 
 
Coordination, Organometalic, Bio-Inorganic,Transition Metal (d-Block)  
Online Test (28
th
, Dec/16) 
1. The correct order of magnetic moments (spin only values in B.M.) among following is: 
 (a) [MnCl
4
]
2-
 > [CoCl
4
]
2-
 > [Fe(CN)
6
]
4-
 (b) [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 > [MnCl
4
]
2- 
 (c) [Fe(CN)
6
]
4-
 > [MnCl
4
]
2-
 > [CoCl
4
]
2-
 (d) [MnCl
4
]
2-
 > [Fe(CN)
6
]
4-
 > [CoCl
4
]
2-
 
2. Which of the following complex is heteroleptic: 
 (a) [Co(NH
3
)
6
]
 
 (b) [Fe(CN)
6
]
3-
 (c) [CoCl(NH
3
)]
2+
 (d) [Ni(CO)
4
] 
3. Which of the following has highest conductivity? 
 (a) [Co(NH
3
)
6
]Cl
3
 (b) K
2
[PtCl
6
]  (c) K
4
[Fe(CN)
6
] (d) [Co(NH
3
)
3
(NO
2
)
3
] 
4. Among the following, the unstable carbonyl species is: 
 (a) Mn(CO)
5
Cl (b) [Mn(CO)
5
]
-
 (c) [Mn(CO)
5
]
+
 (d) Mn(CO)
5
 
5. The oxidation state of molybdenum in [(?
7
 –tropylium) Mo(CO)
3
]
+
 is: 
 (a) +2   (b) +1   (c) 0   (d) -1 
6. Mg
2+
 is preferred in photosynthesis by chlorophyll because: 
 (a) It has strong spin-orbit coupling.  (b) It has weak spin-orbit coupling.  
 (c) It is heavy metal.     (d) It binds strongly with chlorophyll. 
7. The room temperature magnetic moment (µ
eff
 in BM) for a monomeric Cu (II) complex is greater 
than 1.73. This may be explain using the expression: 
 (a)    (b)  
 (c)     (d)   
8. The ground state term symbols for high spin d
5
s
1
 and d
5
-configuration, respectively, are:      
 (a) 
3
s and 
6
s  (b) 
6
p and 
3
s  (c) 
7
s and 
6
s  (d) 
7
p and 
6
s 
9. Among the following, the correct combination of complex and its color is: 
 (a) [Co(CN)
2
]
2–    
Red    (b) [CoCl
4
]
2–         
Orange  
(c) [Co(SCN)
4
]
2–    
Blue    (d) [CoF
4
]
2–          
Yellow 
10. Storage of iron in the body is carried out by:  
 (a) Hemoglobin     (b) Ferritin    
(c) Cytochrome p-450     (d) Myoglobin  
11. Using crystal field theory, identify from the following complex ions that shows same µ
eff
 (spin 
only) value: 
 
2637, Hudson Lane, Behind Khalsa College, Near G.T.B. Nagar Metro Station Gate No. 3 & 4, New Delhi – 110009 
Mob. 011-47455430, 08860929430, e-mail: info@asfinstitute.com, www.asfinstitute.com 
 
 
(A) [CoF
6
]
3–
        (B) [IrCl
6
]
3–
     (C) [Fe(H
2
O)
6
]
2+
 
(a) A and B   (b) A, B and C  (c) B and C  (d) A and C 
12. The correct order of the CO stretching vibrational frequency is:        
 (a) [Ti(CO)
6
]
2-
 > [V(CO)
6
]
-
 > CO > [Cr(CO)
6
]       
(b)  [Cr(CO)
6
] > CO > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
      
 (c) CO > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
 > [Cr(CO)
6
]  
(d) CO > [Cr(CO)
6
] > [V(CO)
6
]
-
 > [Ti(CO)
6
]
2-
 
13. For the following reaction, the metal complexes X and Y are: 
 (i) 
CO(g)
1 atm / 25 C
Ni(s) (X)
?
? ? ? ? ? ? ,   (ii) 
5 5
2NaC H
2
FeCl (Y) ? ? ? ? ? 
 (a) X = NiCO
4
 , Y = Fe(?
5
-C
5
H
5
)
2
  (b) X = Ni(CO)
4
 , Y = Fe(?
1
-C
5
H
5
)
2 
 
(c) X = Ni(CO)
5
 , Y = Fe(?
5
-C
5
H
5
)
2
  (d) X = Ni(CO)
6
 , Y = Fe(?
1
-C
5
H
5
)
2 
 
 14. The complex    follows: 
  
(a) 18e rule and stable     
(b) 16e
-
 rule and unstable 
 (c) 18e
-
 rule and thermodynamically unstable 
 (d) 16e
-
 rule and stable.  
15. The spinels CoFe
2
O
4
 and FeFe
2
O
4, 
respectively are: 
 (a) Inverse and inverse    (b) Inverse and normal 
 (c) Normal and normal    (d) Normal and inverse 
16. In the transformation of oxyhemoglobin to deoxyhemoglobin. Incorrect statement are: 
 (a) Fe
2+
 in low spin state changes to Fe
+2
 in high spin state. 
 (b) Fe
2+
 in low spin state changes to Fe
+3
 in low spin state. 
 (c) Fe
2+
 in high spin state changes to Fe
+2
 in low spin state. 
 (d) Fe
2+
 in high spin state changes to Fe
+2
 in high spin state. 
17. Which of the statements concerning transition metal alkene complexes is correct: 
 (a) Bonding between metal atom and alkene is synergic. 
 (b) A metal atoms must possess an empty p
z
 and d
z
2
 orbitals and filled 2 2
x y
d
?
 
 (c) Alkenes can also behave as divalent bidentate chelating agents in some complexes.  
 (d) C
2
H
4
 group is not planar in its complexes with transition metals.  
 
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18. Which of the following is important for the formation of stable metal carbonyls: 
 (a) Metals with low oxidation states.  (b) Metals with small size.  
 (c) Lowering of carbon-oxygen bond order. (d) EAN is obeyed. 
19. Which of the statements on ferrocene is correct: 
 (a) Ferrocene has a staggered configuration in the solid state.  
 (b) Ferrocene has a sandwiched structure with two parallel rings.  
(c)The stability of ferrocene is attributed to strong s-bonds between iron and Cyclopentadiene 
rings.  
 (d) The Cyclopentadiene rings have been found to rotate freely in solution of ferrocene.   
20. Among the following, species expected to show fluxional behaviour are: 
 (a) [NiCl
4
]
–2
 (tetrahedral)   (b) IF
7
 (Pentagonal bipyramidal) 
 (c) [CoF
6
]
–3
 (Octahedral)   (d) Fe(Co)
5
 (Trigonal bipyramidal)
 
21. In a cluster, H
3
CoRu
3
(CO)
12 
, total number of e
–
 considered to be involved in its formation is: 
22.  The oxidation state of Fe in myoglobin is: 
23. The number of microstate in term 
1
G is: 
24. Among the following, how many number of coordination complex are paramagnetic: 
(i) [FeCl
4
]
–2
         (ii) [Cu(CN)
4
]
–3
      (iii) [Co(Cl)
4
]
–2
    
(iv) [Ni(CO)
4
]           (v) [Co(NH
3
)
6
]
+2
      (vi) [Ni(NH
3
)
6
]
+2
   
25. The complex ion [Ni(CN)
4
]
-2
 has square planer configuration with magnetic moment of zero. 
What would be magnetic moment if it were tetrahedral: 
26. Given that the crystal field stabilization energy for [Co(H
2
O)
6
]
+2
 is 7360 cm
-1
. The calculate value 
of ?
0
 in kj mol
-1
 is: 
27.  In the complex, [Ni
2
(?
5
 – CP)
2
(CO)
2
], the IR stretching frequency appear at 1857 cm
-1
 and 1870 
cm
-1
. Count the valence e
-
 of this complex: 
28. In 18 e
-
 system, the value of x in Fe
3
(CO)
x
 is: 
29. The hapticity of Cycloheptene – 1, 3, 5-triene in (C
7
H
8
) Fe(CO)
3
 is: 
30. For a complex ion [MnL
6
]
+2
, where L is a neutral mono-dentate ligand, the mean pairing energy 
(P) is found to be 28,000 cm
–1
. If the magnitude of ?
0
 is 21,000 cm
–1
. Calculate C.F.S.E is:  
 
 
 
 
 
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Answer Key 
 
1.  (a) 2.  (c) 3.  (d) 4.  (d) 5.  (c) 
6.  (d) 7.  (b) 8.  (c) 9.  (c) 10.  (b) 
11.  (d) 12.  (d) 13.  (a) 14.  (d) 15.  (a) 
16.  (b,c,d) 17.  (a,c,d) 18.  (a,c,d) 19.  (a,b,d) 20.  (b,d) 
21.  (60) 22.  (2) 23.  (9) 24.  (4) 25.  (2.70 – 
2.90) 
26.  (108 – 
110) 
27.  (18) 28.  (12) 29.  (4) 30.  (0)