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)

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

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

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

1. Ni(CO)₄

2. [NiCl₄]^2-

3. Ni(PPh₃)₄

4. [Ni(CN)₄]^2-

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

The complex with a square planar shape and dsp² hybridization among the following is:

1. [Ni(CN)₄]^2-

2. [Cu(NH₃)₄]²⁺

3. [PtCl₄]^2-

4. All of these

Which of the following has regular tetrahedral geometry?

Out of TiF₆^2-,CoF₆^3-, Cu₂Cl₂ and NiCl₄^2-(At. no. Z of Ti=22, Co=27, Cu=29, Ni=28), the colourless species are

1. TiF₆^2- and CoF₆^3-

2. Cu₂Cl₂ and NiCl₄^2-

3. TiF₆^2- and Cu₂Cl₂ 

4. CoF₆^3- and NiCl₄^2-