In the isoelectronic series of metal carbonyl, the CO bond strength is expected to increase in the order:

(1) [Mn(CO)6]+<[Cr(CO)6]<[V(CO)6]-

(2) [V(CO)6]-<[Cr(CO)6]<[Mn(CO)6]+

(3) [V(CO)6]-<[Mn(CO)6]+<[Cr(CO)6]

(4) [Cr(CO)6]<[Mn(CO)6]+<[V(CO)6]-

Subtopic:  VBT, CFT & their Limitations |
 64%
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Which is not true about metal carbonyls?

(1)  Here CO acts as a Lewis base as well as Lewis acid 

(2) Here metal acts as Lewis base as well as Lewis acid 

(3) Here - back bonding takes place

(4) Here - back bonding takes place

Subtopic:  Ligands |
 57%
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[Fe(H2O)6]2+ and [Fe(CN)6]4-  differ in:

1. Geometry and magnetic moment.

2. Geometry and hybridization.

3. Magnetic moment and colour.                       

4. Hybridization and number of d-electrons.

Subtopic:  VBT, CFT & their Limitations |
 55%
From NCERT
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Which of the following complexes have a maximum number of unpaired electrons?

(a) [Ni(CO)4]                                (b) [Co(NH3)4(NO2)2]+

(c) [Ag(CN)2]-                              (d) [CuBr4]2-

Subtopic:  VBT, CFT & their Limitations |
From NCERT
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The degeneracy of d-orbitals is lost under:

(I) Strong field ligand                 (II) Weak field ligand

(III) Mixed field ligand                 (IV) Chelate

Choose the correct code:

(1) I,II and IV                                 

(2) I and II

(3) I,II,III and IV                             

(4) I,II and III

Subtopic:  Ligands |
 51%
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Which of the following isomerism, exhibited by [CrCl2(OH)2(NH3)2]?

(1)Ionization     

(2) Geometrical

(3) Hydrate       

(4) Linkage

Subtopic:  Isomerism in Coordination Compounds |
 79%
From NCERT
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How many geometrical isomers and stereoisomers are possible for [Pt(NO2)(NH3)(NH2OH)(Py)]+  and   [Pt(Br)(Cl)(I)(NO2)(NH3)(Py)]    respectively?

(a) 3 and 15                 (b)  3 and 30

(c) 4 and 15                  (d) 4 and 30 

Subtopic:  Isomerism in Coordination Compounds |
 50%
From NCERT
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 A compound that form two stereoisomer is -

(I) [Cr(NO3)3(NH3)3]     

(II) K3[Fe(C2O4)3]

(III) [CoCl2(en)2]+       

(IV) [CoBrCl(ox)2]3-

(1)I only     

(2) I and II   

(3) III and IV   

(4) All of these  

Subtopic:  Isomerism in Coordination Compounds |
From NCERT
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Three arrangements are shown for the complex [CoBr2(NH3)2(en)]. Which one is wrong statement?

1. I and II are geometrical isomers 

2. II and III are optically active isomers 

3. I and III are optically active isomers

4.  II and III are geometrical isomers

Subtopic:  VBT, CFT & their Limitations |
 61%
From NCERT
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A complex with the composition [MA3B]n± is found to have no geometrical isomers. The possible structures (s) of the complex is (Where A and B are monodentate ligands)

(1) Tetrahedral                   

(2) Square planar

(3) Both (a) and (b)             

(4) Cannot be predicted

Subtopic:  VBT, CFT & their Limitations |
 61%
From NCERT
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