Coordination Compounds

Consider the following low-spin complexes K3[Co(NO2)6], K4[Fe(CN)6], K3[Fe(CN)6], Cu2[Fe(CN)6] and Zn2[Fe(CN)6] The sum of the spin-only magnetic moment values of complexes having yellow colour is B.M. (answer in nearest integer)

Match List - I with List - II. Choose the correct answer from the options given below:

1. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
2. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
3. (A)-(I), (B)-(IV), (C)-(III), (D)-(II)
4. (A)-(III), (B)-(II), (C)-(I), (D)-(IV)

One mole of the octahedral complex compound Co(NH3)5Cl3 gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with excess of AgNO3 solution to yield two moles of AgCl(s). The structure of the complex is:

1. [Co(NH3)5Cl]Cl2
2. [Co(NH3)4Cl] Cl2 NH3
3. [Co(NH3)3Cl3] 2NH3
4. [Co(NH3)4Cl2] Cl NH3

The conditions and consequence that favours the t2g3eg1 configuration in a metal complex are :

1. strong field ligand, low spin complex
2. strong field ligand, high spin complex
3. weak field ligand, high spin complex
4. weak field ligand, low spin complex

When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be:

1. Pale Blue Blue Green Violet
2. Pale Blue Blue Violet Green
3. Green Pale Blue Blue Violet
4. Violet Blue Pale Blue Green

The d-electronic configuration of an octahedral Co (II) complex having magnetic moment of 3.95 BM is:

1. e4t23
2. t2g6eg1
3. t2g5eg2
4. t2g3eg0

The complex that shows Facial - Meridional isomerism is :

1. [Co(en)2Cl2]+
2. [Co(NH3)3Cl3]
3. [Co(NH3)4Cl2]+
4. [Co(en)3]3+

Identify the coordination complexes in which the central metal ion has d4 configuration. Choose the correct answer from the options given below :

1. B, C and D only
2. C and E only
3. A, B and E only
4. B and D only

From the magnetic behaviour of [NiCl4]2- (paramagnetic) and [Ni(CO)4] (diamagnetic), choose the correct geometry and oxidation state.

1. [NiCl4]2- : Ni(0), tetrahedral [Ni(CO)4] : Ni(0), square planar
2. [NiCl4]2- : NiII, tetrahedral [Ni(CO)4] : Ni(0), tetrahedral
3. [NiCl4]2- : NiII, tetrahedral [Ni(CO)4] : NiII, square planar
4. [NiCl4]2- : NiII, square planar [Ni(CO)4] : Ni(0), square planar

In which of the following complexes the CFSE, o will be equal to zero?

1. K3[Fe(SCN)6]
2. [Fe(en)3]Cl3
3. [Fe(NH3)6]Br2
4. K4[Fe(CN)6]