Coordination Compounds

Number of paramagnetic complexes among the following is . [MnBr4]2-, [NiCl4]2-, [Ni(CN)4]2-, [Ni(CO)4], [CoF6]3-, [Fe(CN)6]4-, [Mn(CN)6]3-, [Ti(CN)6]3-, [Cu(H2O)6]2+, [Co(C2O4)3]3-

Match the LIST-I with LIST-II

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

Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex? Choose the correct answer from the options given below :

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

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

The total number of unpaired electrons present in the d3, d4 (low spin) d5 (high spin), d6 (high spin) and d7 (low spin) octahedral complex systems is .

Consider the metal complexes [Ni(en)3]2+ (A), [NiCl4]2- (B) and [Ni(NH3)6]2+ (C). Choose the CORRECT option by considering the number of unpaired electrons present in (A), (B) and (C) respectively and the order of frequency of absorption.

1. 2, 2, 2 and (A) > (C) > (B)
2. 0, 2, 0 and (A) > (C) > (B)
3. 2, 2, 0 and (B) > (C) > (A)
4. 2, 2, 2 and (C) > (A) > (B)

Match List - I with List - II.

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

The correct increasing order of spin-only magnetic moment values of the complex ions [MnBr4]2- (A), [Cu(H2O)6]2+ (B), [Ni(CN)4]2- (C) and [Ni(H2O)6]2+ (D) is :

1. A = B < D < C
2. C = D < B < A
3. C < B < D < A
4. A = B < C < D

The number of isoelectronic species among Sc3+, Cr2+, Mn3+, Co3+ and Fe3+ is ‘n’. If ‘n’ moles of AgCl is formed during the reaction of complex with formula CoCl3(en)2NH3 with excess of AgNO3 solution, then the number of electrons present in the t2g orbital of the complex is .

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are false
2. Both Statement I and Statement II are true
3. Statement I is false but Statement II is true
4. Statement I is true but Statement II is false

The crystal field stabilisation energy of [Co(oxalate)3]3- complex is 'n' times that of the [Cr(oxalate)3]3- complex. Here 'n' is . (Assume o P)

Consider the transition metal ions Mn3+, Cr3+, Fe3+ and Co3+ and all form low spin octahedral complexes. The correct decreasing order of unpaired electrons in their respective d-orbitals of the complexes is

1. Cr3+ > Mn3+ > Fe3+ > Co3+
2. Mn3+ > Fe3+ > Co3+ > Cr3+
3. Fe3+ > Co3+ > Mn3+ > Cr3+
4. Cr3+ > Fe3+ > Co3+ > Mn3+

[Ni(PPh3)2Cl2] is a paramagnetic complex. Identify the INCORRECT statements about this complex. Choose the correct answer from the options given below :

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

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Statement I is true but Statement II is false
2. Both Statement I and Statement II are true
3. Both Statement I and Statement II are false
4. Statement I is false but Statement II is true

Identify the metal ions among Co2+, Ni2+, Fe2+, V3+ and Ti2+ having a spin-only magnetic moment value more than 3.0 BM. The sum of unpaired electrons present in the high spin octahedral complexes formed by those metal ions is .

The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively : [Fe(CN)6]3-, [FeF6]3-, [CoF6]3-, [Mn(CN)6]3-

1. 1, 5, 4, 2
2. 1, 4, 4, 2
3. 1, 5, 5, 2
4. 1, 1, 4, 2

Which one of the following complexes will have o = 0 and = 5.96 B.M.?

1. [FeF6]4-
2. [Mn(SCN)6]4-
3. [Co(NH3)6]3+
4. [Fe(CN)6]4-

'X' is the number of electrons in t2g orbitals of the most stable complex ion among [Fe(NH3)6]3+, [FeCl6]3-, [Fe(C2O4)3]3- and [Fe(H2O)6]3+. The nature of oxide of vanadium of the type V2OX is :

1. Amphoteric
2. Acidic
3. Basic
4. Neutral

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

1. Both Statement I and Statement II are incorrect
2. Statement I is correct but Statement II is incorrect
3. Statement I is incorrect but Statement II is correct
4. Both Statement I and Statement II are correct

A transition metal (M) among Mn, Cr, Co and Fe has the highest standard electrode potential (M3+/M2+). It forms a metal complex of the type [M(CN)6]4-. The number of electrons present in the eg orbital of the complex is .

The d-orbital electronic configuration of the complex among [Co(en)3]3+, [CoF6]3-, [Mn(H2O)6]2+ and [Zn(H2O)6]2+ that has the highest CFSE is:

1. t2g6eg0
2. t2g3eg2
3. t2g4eg2
4. t2g6eg4

The correct increasing order of stability of the complexes based on 0 value is : I. [Mn(CN)6]3- II. [Co(CN)6]4- III. [Fe(CN)6]4- IV. [Fe(CN)6]3-

1. I < II < IV < III
2. IV < III < II < I
3. III < II < IV < I
4. II < III < I < IV

The calculated spin-only magnetic moments K3[Fe(OH)6] and K4[Fe(OH)6] respectively are :

1. 4.90 and 4.90 B.M.
2. 4.90 and 5.92 B.M.
3. 5.92 and 4.90 B.M.
4. 3.87 and 4.90 B.M.

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

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

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

Number of Complexes with even number of electrons in t2g orbitals is - [Fe(H2O)6]2+, [Co(H2O)6]2+, [Co(H2O)6]3+, [Cu(H2O)6]2+, [Cr(H2O)6]2+

1. 3
2. 2
3. 1
4. 5

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

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