The compound that is not  $\mathrm{\pi }$-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:

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

1. Ag⁺

2. Cu²⁺

3. Cd²⁺

4. Na⁺

The denticity of EDTA is:

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

1. 2

2. 4

3. 6

4. 8

The correct IUPAC name of KAl(SO₄)₂.12H₂O is:

1. Aluminium potassium sulphate-12-water

2. Potassium aluminium(III)sulphate-12-water

3. Potassium aluminate(III)sulphatehydrate

4. Aluminium(III) potassium sulphate hydrate-12

The correct IUPAC name for Mn₃(CO)₁₂ is:

1. Dodecacarbonylmanganate(0)

2. Dodecacarbonylmanganate(II)

3. Dodecacarbonyltrimanganese(0)

4. Manganicdodecacarbonyl0)

The complex among the following that exhibits a spin-only magnetic moment of 2.82 B.M. is:

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