Which of the following order of CFSE is incorrect?

(a) [Co(en)3]3+ >[Co(NH3)6]3+>[Co(H2O)6]3+

(b) [PtCl4]2->[PdCl4]2->[NiCl4]2-

(c) [Ni(DMHH)2]<[Ni(en)2]2+

(d) [Co(ox)3]3-<[Co(en)3]3+

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VBT & CFT, Limitation /Hybridisation
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For which of the following dn configuration of octahedral complexes, can not exist in both high spin and slow spin forms:

(I) d3                  (II) d5               (III) d6             (IV) d8

(a) I,II and III                                  (b) II,III & IV

(c) I & IV                                          (d) None of these

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VBT & CFT, Limitation /Hybridisation
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Consider the complex [Co(NH3)4CO3]ClO4 , in which coordination number, oxidation number and number of d-electrons on the metal are respectively.

(a) 6,3,6        (b) 6,2,7      (c) 5,3,6      (d) 5,3,7

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The π-ligand which uses its d-orbital during synergic bonding in its complex compound.

(a) CN-    (b) PR3      (c) NO      (d) N2

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The IR stretchin frequencies of free CO, and CO in [V(CO)6]- , [Cr(CO)6]- and [Mn(CO)6]- are 2143 cm-1, 1860 cm-1,2000 cm-1 and 2090 cm-1, respectively. Then correct statement about metal carbonyls is :

(a) 'C-O' bond is strongest in the cation and weakest in the anion.

(b) 'C-O' bond is weakest in the cation and strongest in the anion.

(c) 'C-O' bond is longer in the cation than in the anion.

(d) 'M-C' pi bonding is higher in the cation.

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VBT & CFT, Limitation /Hybridisation
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The π-acid ligand which uses its d-orbital during synergic bonding in its complex compound:

(a) NO+     (b) PR3    (c) C6H6    (d) CO

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VBT & CFT, Limitation /Hybridisation
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Correct sequence of CO bond order in given compounds is:

(P) Fe(CO)5   (Q) PR3    (R) H3BCO     (S) [Mn(CO)5]-

(a) P>R>S>Q                   (b) S>P>R>Q

(c) Q>S>P>R                   (d) R>Q>P>S

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VBT & CFT, Limitation /Hybridisation
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In which of the following complex ion the value of magnetic moment (spin only) is 3

BM and outer d-orbitals is used in hybridization.

(a) [Mn(CN)6]4-      (b) [Fe(NH3)6]3+     (c) [Co(CO)4]         (d) [Cu(H2O)6]2+

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VBT & CFT, Limitation /Hybridisation
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The inner orbital complex which exhibits both geometrical as well as optical isomerism.

(a) [Cr(en)3]3+                        (b) [IrF3(H2O)2(NH3)]

(c) [NiCl2(en)2]                        (d) [Co(CN)2(ox)2]3-

 

Concept Questions :-

Isomer in Coordination Compound
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Match List-I and List-II and select the correct answer using the codes given below the lists:

                       List-I                                                 List-II

(A) [Ni(NH3)6]2+                                                    (1) sp3

(B) [PtCl4]2-                                                         (2) sp3d2

(C) [Ni(CO)4]                                                         (3) dsp2  

(D) [Co(ox)3]3-                                                      (4) d2sp3

         A        B         C          D                                A        B         C          D 

(a)     2        1         3          4                      (b)       2        3         1          4 

(c)      4       1          3         2                       (d)       4        3         1          2

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VBT & CFT, Limitation /Hybridisation
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