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

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

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

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

1. Ag⁺

2. Cu²⁺

3. Cd²⁺

4. Na⁺

The coordination number of cobalt in[Co(en)₂Br₂]Cl₂ is:

1. 2

2. 4

3. 6

4. 8

Atomic number of Cr and Fe are respectively 24 and 26 which of the following is paramagnetic with the spin of electron?

1. [Cr(CO)₆]

2. [Fe(CO)₅]

3. [Fe(CN)₆]^4-

4. [Cr(NH₃)₆]³⁺

Which compound among the following does not exhibit paramagnetism?

1. [Cu(NH₃)₄]Cl₂

2. FeO

3. NO

4. N₂O₄