The hybridisation of Ni in the complex [Ni(CN)₄]^2- is:
(Atomic number of Ni = 28)

1. dsp²                               

2. sp³

3. d²sp²                             

4. d²sp³

The sum of coordination number and oxidation number of the metal M in the complex M(en)₂(C₂O₄)]Cl (where, en is ethylenediamine) is : 

1. 9

2. 6

3. 7

4. 8

The name of complex ion, [Fe(CN)₆]^3- is :-

1. hexacyanoiron (III) ion

2. hexacyanitoferrate (III) ion

3. tricyanoferrate (III) ion

4. hexacyanidoferrate (III)ion

Among the following complexes, the one which shows zero crystal field stabilisation

energy (CFSE) is:-

1. [Mn(H₂O)6]³⁺

2. [Fe(H₂O)6]³⁺

3. [Co(H₂O)6]²⁺

4. [Co(H₂O)6]³⁺

The complex that is used as an anticancer agent is:

1. mer-[Co(NH₃)₃Cl₃         

2. cis-[PtCl₂(NH₃)₂]

3. cis-K₂[PtCl₂ Br₂]           

4. Na₂CoCl₄

A magnetic moment of 1.73 BM will be shown by one among the following

1. [Cu(NH₃)₄]²⁺      

2. [Ni(CN)₄]^2-

3. TiCl₄                  

4. [CoCl₆]^4-

Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?

1. [Ni(NH₃)₆]²⁺                 

2. [Zn(NH₃)₆]²⁺

3. [Cr(NH₃)₆]³⁺                 

4. [Co(NH₃)₆]³⁺

The d-electron configurations of Cr²⁺, Mn²⁺, Fe²⁺ and CO²⁺ are d⁴, d⁵, d⁶ and d⁷

respectively. Which one of the following will exhibit minimum paramagnetic behaviour?

(At. no. Cr = 24, Mn =25, Fe=26, CO=27)

1. [Fe(H₂O)₆]²⁺

2. [Co(H₂O)₆]²⁺

3. [Cr(H₂O)₆]²⁺

4. [Mn(H₂O)₆]²⁺

Of the following complex ions, the diamagnetic complex is:

1. [Ni(CN)₄]^2-                       

2. [CuCl₄]^2-

3. [CoF₆]^3-                           

4. [NiCl₄]^2-

The complexes [CO(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆][Co(CN)₆] are examples of: