Jahn-Teller effect is not observed in high spin complexes of

1. d⁷

2. d⁸

3. d⁴

4. d⁹

Which of the following has longest C-O bond length? (Free C-O bond length in CO is

1.128 Å.)

1. [Co(СО)₄]^-

2. [Fe(CO)₄]^2-

3. [Mn(CO)₆]⁺

4. Ni(CO)₄

Which of the following statements is false?

1. Ca²⁺ ions are important in blood clotting

2. Ca²⁺ ions are not important in maintaining the regular beating of the heart

3. Mg²⁺ ions are important in the green parts of plants

4. Mg²⁺ ions form a complex with ATP

The correct statement among the following about [Co(CN)₆]^3- is :

The total number of possible isomers for the complex [Co(en)₂Cl₂]Cl are:
[en-ethylenediamine]

1. 2                         

2. 1

3. 3                         

4. 4

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