Three arrangements are shown for the complex [CoBr2(NH3)2(en)]. Which one is wrong statement?

(a) I and II are geometrical isomers 

(b) II and III are optically active isomers 

(c) I and III are optically active isomers

(d) II and III are geometrical isomers

 

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VBT & CFT, Limitation /Hybridisation
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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)

(a) Tetrahedral                    (b) Square planar

(c) Both (a) and (b)             (d) Cannot be predicted

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VBT & CFT, Limitation /Hybridisation
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Complexes formed in the following methods are:

(I) Mond's process for purification of nickel

(II) Removal of unreacted AgBr from photographic plate

(III) Removal of lead poisoning from the body

Options are as follows: 

             I                                       II                                           III(a) Ni(CO)4                            [Ag(CN)2]-                       [Pb(EDTA)]2-(b) Ni(CO)4                            [Ag(S2O3)2]3-                 [Pb(EDTA)]2-(c) Ni(CO)6                            [Ag(S2O3)]3-                   [Pb(EDTA)]4-(d) Ni(CO)6                            [Ag(S2O3)]-                    [Pb(EDTA)]4-  

Concept Questions :-

Coordination comp,Introduction and Classification / Nomenclature
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The correct for the name for the complex ion [CoCl(ONO)(en)2]+ is:

(a) chlorobis(ethylenediamine)nitrito-O-cobaltate(III) ion

(b) chlorodiethyldiaminenitrito-O-cobalt(III) ion

(c) chloronitrito-O-diethyldiamine cobaltate (III) ion

(d) chlorobis (ethylenediamine)nitrito-O-cobalt (III) ion

 

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IUPAC name of H2[PtCl6] is:

(a) hydrogen hexachloroplatinate (IV)

(b) dihydrogen hexachloroplatinate (IV)

(c) hydrogen hexachloroplatinic (IV) acid

(d) hexachloroplatinic (IV) acid

Concept Questions :-

Coordination comp,Introduction and Classification / Nomenclature
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Which of the following ligand does not as π-acid ligand?

(a) N2           (b) CO              (c) C2H4                 (d) O22-

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[Mn(CO)4NO] is diamagnetic because:

(a) Mn metal is diamagnetic in free state

(b) Mn is in +1 oxidation state in this complex

(c) NO is present as positive ligand

(d) All of the above

 

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VBT & CFT, Limitation /Hybridisation
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Choose the correct option regarding the following complex compound which follows (F) and does not follow (NF) the Sidgwick EAN rule:

(I) [(Ph3P)2PdCl2PdCl2]                     (II) [NiBrCl(en)]

(III) Na4[Fe(CN)5NOS]                       (IV) Cr(CO)3(NO)2

        (I)    (II)    (III)    (IV)                       (I)    (II)    (III)     (IV) 

(a)    NF   NF      NF       NF                 (b)    F       F        NF        F

(c)     NF   NF      F          F                  (d)   NF      NF      F          NF 

 

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If CO ligands are substituted by NO in respective neutral carbonyl compounds then which of the following will not be correct formula ?

(a) Cr(CO)3(NO)2                       (b) Fe(CO)2(NO)2

(c) Cr(NO)4                                (d) Ni(CO)2(NO)2

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Which of the following species can act as reducing agent ?

(a) [Co(CO)4]-      (b) Mn(CO)6       (c) Mn(CO)5       (d) Cr(CO)6      

 

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