Coordination Compounds

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]

The correct order of the following complexes in terms of their crystal field stabilization energies is :

1. [Co(NH3)4]2+ < [Co(NH3)6]2+ < [Co(NH3)6]3+ < [Co(en)3]3+
2. [Co(NH3)4]2+ < [Co(NH3)6]2+ < [Co(en)3]3+ < [Co(NH3)6]3+
3. [Co(NH3)6]2+ < [Co(NH3)6]3+ < [Co(NH3)4]2+ < [Co(en)3]3+
4. [Co(en)3]3+ < [Co(NH3)6]3+ < [Co(NH3)6]2+ < [Co(NH3)4]2+

Identify the homoleptic complex(es) that is/are low spin. Choose the correct answer from the options given below :

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

The complex of Ni2+ ion and dimethyl glyoxime contains number of Hydrogen (H) atoms.

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below :

1. (A) is correct but (R) is not correct
2. (A) is not correct but (R) is correct
3. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
4. Both (A) and (R) are correct and (R) is the correct explanation of (A)

Number of ambidentate ligands among the following is . NO2-, SCN-, C2O42-, NH3, CN-, SO42-, H2O.

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

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

The coordination environment of Ca2+ ion in its complex with EDTA4- is :

1. trigonal prismatic
2. octahedral
3. square planar
4. tetrahedral