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

From the stability constant (hypothetical  values)given below, predict which is the strongest ligand?

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

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

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

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

Which does not obey EAN rule?

1. [Cu(NH₃)₄]²⁺

2. [Zn(OH)₄]^2-

3. [HgI₄]^2-

4. Fe(CO)₅

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

1. 3 and +3

2. 3 and 0

3. 6 and +3

4. 4 and +2

The octahedral complex will not show geometrical isomerism is :
(A and B are monodentate ligands)

1. [MA₄B₂]

2. [MA₅B]

3. [MA₂B₄]

4. [MA₃B₃]

According to IUPAC nomenclature sodium nitroprusside is named as

1. sodium pentacyanonitrosyl ferrate(II)

2. sodium pentacyanonitrosyl ferrate(III)

3. sodium nitroferricyanide

4. sodium nitroferrocyanide

Among the following the compound that is not the $\mathrm{\pi }$-bonded organometallic compound is :

1. K[PtCl₃(${\eta }^{\mathit{2}}$-C₂H₄)]

2. Fe(${\eta }^5$-C₅H₅)₂

3. Cr(${\eta }^6$-C₆H₆)₂

4. (CH₃)₄Sn

IUPAC name of [Pt(NH₃)₃ (Br)(NO₂)Cl]Cl is :

1. Triamminebromidochloridonitroplatinum(IV)Chloride

2. Triamminebromonitrocholoroplatinum(IV)Chloride

3. Triamminechlorobromonitroplatinum(IV)Chloride

4. Triamminenitrochlorobromoplatinum(IV)Chloride

Which of the following cation does not form an ammine complex with excess of ammonia?

1. Ag⁺

2. Cu²⁺

3. Cd²⁺

4. Na¹⁺

The denticity of EDTA is : 

1. Monodentate.

2. Hexadentate.

3. Bidentate.

4. Tridentate.