EAN of Fe in K₃[Fe(CN)₆] is

1. 34

2. 35

3. 36

4. 47

Which of the following has square planar structure?

1. [NiCl₄]^2-

2. [Ni(CO)₄]

3. [Ni(CN)₄]^2-

4. None of these

The correct statement, among the following, regarding [Mn(CN)₆]^3- is:

1. It is sp³d² hybridised and octahedral in shape

2. It is sp³d² hybridised and tetrahedral in shape

3. It is d²sp³ hybridised and octahedral in shape

4. It is dsp² hybridised and square planar in shape

The crystal field stabilisation energy for the high spin d⁴ octahedral complex is:

1. -1.8 $∆$_o

2. -1.6 $∆$_o

3. -1.2 $∆$_o

4. -0.6 $∆$_o

Which of the following complex will show geometrical as well as optical isomerism ?

1. [Pt(NH₃)₂Cl₂]

2. [Pt(NH₃)Cl₃]

3. [Pt(en)₂Cl₂]

4. [Pt(en)₃]⁴⁺

The number of ions formed in K₄[Fe(CN)₆] are

1. 11

2. 5

3. 4

4. 9

[Cu(NH₃)₄]²⁺ is complex which have

1. Square planar structure and diamagnetic nature

2. Tetrahedral structure and paramagnetic nature

3. Square planar structure and paramagnetic nature

4. Tetrahedral structure and diamagnetic behaviour.

An example of a sigma bonded organometallic compound is:

1. Ruthenocene                 

2. Grignard's reagent

3. Ferrocene                     

4. Cobaltocene

The correct order of the stoichiometrics of AgCl formed when AgNO₃ in excess is treated with the complexes:- CoCl₃.6NH₃, CoCl₃.5NH₃, CoCl₃.4NH₃, respectively, is :

1. 1 AgCl, 3 AgCl, 2 AgCl

2. 3 AgCl, 1 AgCl, 2 AgCl

3. 3 AgCl, 2 AgCl, 1 AgCl

4. 2 AgCl, 3AgCl,  1 AgCl

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of Co³⁺ is : 

(1)  $[\mathrm{Co}{\left(\mathrm{en}\right)}_3{]}^{3+}$ , $[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6{]}^{3+}$ , $[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6{]}^{3+}$

(2)  $[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6{]}^{3+}$ , $[\mathrm{Co}{\left(\mathrm{en}\right)}_3{]}^{3+}$, $[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6{]}^{3+}$

(3)  $[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6{]}^{3+}$, $[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6{]}^{3+}$, $[\mathrm{Co}{\left(\mathrm{en}\right)}_3{]}^{3+}$  

(4)  $[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6{]}^{3+}$,$[\mathrm{Co}{\left(\mathrm{en}\right)}_3{]}^{3+}$, $[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6{]}^{3+}$