Pick out the correct statement with respect to [Mn(CN)₆]^3-.
 

1. It is sp³d² hybridised and octahedral.

2. It is d²sp³ hybridised and octahedral.

3. It is sp³d² hybridised and tetrahedral.

4. It is dsp² hybridised and square planar.

The correct increasing order of trans-effect of the following species is

1. NH₃ > CN^- > Br^- > C₆H₅^-

2. CN^- > C₆H₅^- > Br^- > NH₃

3. Br^- > CN^- >NH₃ > C₆H₅^-

4. CN^- > Br^- >C₆H₅^- >NH₃

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

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the

following will not give test for chloride ions with silver nitrate at 25°C?

1. CoCl₃.3NH₃

2. CoCl₃ .4NH₃

3. CoCI3 .5NH3

4. CoCl₃.6NH₃

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