The EAN of metal atoms in FeCO2NO+2 and (Co)2(CO)8 respectively are :

1. 34, 35 

2. 34, 36

3. 36, 36                                       

4. 36, 35

Subtopic:  E.A.N |
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Match the complex ions listed in column-I with the characteristics listed in column-II using the codes given below.

Column-I                                                        Column-II

(a) NiNH362+                                     (p) d2sp3 and diamagnetic

(b) CrNH363+                                     (q) sp3d2 and diamagnetic

(c) CoNH363+                                     (r) sp3d2 and two unpaired electrons.

(d) ZnNH362+                                     (s) d2sp3 and three unpaired electrons.

                 a   b   c   d
(1)            r    s   p   q
(2)            s   r   q    p
(3)            r   s   q    p
(4)            p  q   r    s

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Which of the following statements is correct?

(A) CrH2O62+ aq and CrCN64- aq are high spin and low spin complexes respectively but

     both have same number of unpaired electrons.

(B) VNH363+ is inner orbital complex and paramagnetic with two unpaired electrons.

(C) CoCN64- is outer orbital complex and paramagnetic with three unpaired electrons.

(D) MnNO3CO is square planar and diamagnetic.

 

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All the following complex ions are found to be paramagnetic

P : FeF63-;  Q : COF63-;  R : VH2O63+;  S : TiH2O63+

The correct order of their paramagnetic moment (spin only) is

(1) P>Q>R>S                               

(2) P<Q<R<S

(3) P=Q=R=S                               

(4) P>R>Q>S

Subtopic:  VBT, CFT & their Limitations |
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Among NiCl2PPh32, NiHDMG2 and NiCO4 complexes the hybridisation states of Ni atom are respectively.

(A) sp3, sp3, dsp2                                   

(B) sp3, dsp2, sp3

(C) dsp2, dsp2, sp3                               

(D) sp3, dsp2, dsp2

Subtopic:  VBT, CFT & their Limitations |
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Amongst Coox33-, CoF63- and CoNH363+ : 

1. Coox33- and CoF63- are paramagnetic and CoNH363+ is diamagnetic.

2. Coox33- and CoNH363+ are paramagnetic and CoF63- is diamagnetic.

3. Coox33- and CoNH363+ are diamagnetic and CoF63 is paramagnetic.

4. CoNH363+and CoF63- are paramagnetic and Coox33+ is diamagnetic.

Subtopic:  VBT, CFT & their Limitations |
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All the following complexes show decrease in their weights when placed in a magnetic balance then the group of complexes having tetrahedral geometry is :

(i) NiCO4              (ii) KAgF4           (iii) Na2ZnCN4            (iv) K2PlCl4          (V) RhClPPh33

(1) (ii), (iii) and (v)                                       

(2) (i), (ii) and (iii)

(3) (i), (iii) and (iv)                                       

(4) None of the above.

Subtopic:  VBT, CFT & their Limitations |
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The 'brown ring' formed at the junction of two layers in the test of nitrate is due to the formation of a complex ion, FeH2O5NO2+. Which of the following statemens are correct for this complex [u=3.87 B.M.)

 (i) Oxidation state of Fe is +1 and NO exists as NO+.

 (ii) The complex ion is in octahedral geometry as attained by sp3d2 hybridisation.

(iii) The complex is paramagnetic and has three unpaired electrons due to transfer of electron from NO to Fe2+.

(iv) The complex is in octahedral geometry as attained by d2sp3 hybridisation.

 (v) The brown colour of the complex is attributed to d-d transition of electron.

 

(1) (i), (ii) and (v)                                       

(2) (iii), (iv) and (v)

(3) (i), (ii) and (iii)                                       

(4) (ii), (iii) and (v)

Subtopic:  Introduction, Classification and Nomenclature |
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The incorrect statement among the following is:

1. TiNO34 is a colourless compound.

2. CuNCCH34+BF4- is a colourless compound.

3. CrNH363+3Cl is a coloured compound..

4. K3VF6 is a colourless compound.

Subtopic:  Introduction, Classification and Nomenclature |
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Identify the correct order of wavelength of light absorbed for the following complex ions.

CoH2O63+ ;          CoCN63- ;             CoI63- ;               Coen33+

          I                                      II                                 III                                 IV

(1) III>I>IV>II                                 

(2) II>IV>I>III

(3) III>I>II>IV                                 

(4) I>III>IV>II

Subtopic:  VBT, CFT & their Limitations |
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