Fe2(CO)9 is diamagnetic.Which of the following reasons is correct?

1. Presence of one CO as bridge group

2. Presence of monodentate ligand

3. Metal-metal(Fe-Fe) bond in molecule

4. Resonance hybridization of CO

Concept Questions :-

Organometallic complex and their uses
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From the stability constant (hypothetical  values)given below, predict which is the strongest ligand?

1. Cu2++4NH3[Cu(NH3)4]2+;(k=4.5x1011)

2. Cu2++4CN[Cu(CN)4]2-;(K=2.0x1027)

3. Cu2++2en[Cu(en)2]2+;(K=3.0x1015)

4. Cu2++4H2O[Cu(H2O)4]2+;(K=9.5x108)

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VBT & CFT, Limitation /Hybridisation
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Which does not obey EAN rule?

(a) [Cu(NH3)4]2+

(b) [Zn(OH)4]2-

(c) [HgI4]2-

(d) Fe(CO)5

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The coordination number and oxidation state of Cr in K3[Cr(C2O4)3] are respectively

(a) 3 and +3

(b) 3 and 0

(c) 6 and +3

(d) 4 and +2

Concept Questions :-

Werner’s Theory
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Which one of the following octahedral complexes will not show geometrical isomerism?(A and B are monodentate ligands)

(a) [MA4B2]

(b) [MA5B]

(c) [MA2B4]

(d) [MA3B3]

Concept Questions :-

Isomer in Coordination Compound
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According to IUPAC nomenclature sodium nitroprusside is named as

(a) sodium pentacyanonitrosyl ferrate(II)

(b) sodium pentacyanonitrosyl ferrate(III)

(c) sodium nitroferricyanide

(d) sodium nitroferrocyanide

Concept Questions :-

VBT & CFT, Limitation /Hybridisation
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Amoung the following which is not the π-bonded organomettalic compound?

(a) K[PtCl3(η2-C2H4)]

(b) Fe(η5-C2H5)2

(c) Cr(η6-C6H6)2

(d) (CH3)4Sn

Concept Questions :-

VBT & CFT, Limitation /Hybridisation
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IUPAC name of [Pt(NH3)3 (Br)(NO2)Cl]Cl is

(a) triamminebromidochloridonitroplatinum(IV)Chloride

(b) triamminebromonitrocholoroplatinum(IV)Chloride

(c) triamminechlorobromonitroplatinum(IV)Chloride

(d)triamminenitrochlorobromoplatinum(IV)Chloride

Concept Questions :-

Coordination comp,Introduction and Classification / Nomenclature
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Which of the following cation does not form an ammine complex with excess of ammonia?

(a) Ag+

(b) Cu2+

(c) Cd2+

(d) Na1+

Concept Questions :-

Coordination comp,Introduction and Classification / Nomenclature
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EDTA is a ligand.

(a) monodentate

(b) hexadentate

(c) bidentate

(d) tridentate

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