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

A solution containing 2.675 g of CoCl₃.6NH₃ (molar mass = 267.5 g mol^-1) is passed through a cation exchanger. The chloride ions obtained in the solution were treated with an excess of AgNO₃ to give 4.78 g of AgCl. Formula of the complex is (Atomic mass of Ag = 108u) :

1. [CoCl(NH₃)₅]Cl₂

2. $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]{\mathrm{Cl}}_3$

3. [CoCl₂(NH₃)₄]Cl

4. [CoCl₃(NH₃)₃]

Trunbull's blue is :

1. ferricyanide

2. ferrous ferricyanide

3. ferrous cyanide

4. ferri ferrocyanide

The correct IUPAC name of AlCl₃(EtOH)₄ is:

1. Aluminium (II)Chloride-4-ethanol

2. Aluminium (III)Chloride-4-ethanol

3. Aluminium (IV)Chloride-4-hydroxy ethane

4. Aluminium Chloride-4-ethanol

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?

The primary valency of Fe in K₃[Fe(CN)₆] is:

1. 3

2. 2

3. 1

4. zero

The IUPAC name for the complex [Co(NO₂)(NH₃)₅]Cl₂ is:

1. Nitro-N-pentaamminecobalt(III)chloride

2. Nitro-N-pentaamminecobalt(II)chloride

3. Pentamminenitro-N-cobalt(II)chloride

4. Pentaamminenitrito-N-cobalt(III)chloride.