23. Co-ordination Compounds

Choose the correct Statements from the following:
(A) Ethane-1 2-diamine is a chelating ligand.
(B) Metallic aluminium is produced by elecrtrolysis of aluminium oxide in presence of cryolite.
(C) Cyanide ion is used as ligand for leaching of silver.
(D) Phosphine act as a ligand in Wilkinson catalyst.
(E) The stability constants of Ca2+ and Mg2+ are similar with EDTA complexes.
Choose the correct answer from the options given below:

[30-Jan-2024 Shift 1]

Choose the correct Statements from the following:
(A) Ethane-1 2-diamine is a chelating ligand.
(B) Metallic aluminium is produced by elecrtrolysis of aluminium oxide in presence of cryolite.
(C) Cyanide ion is used as ligand for leaching of silver.
(D) Phosphine act as a ligand in Wilkinson catalyst.
(E) The stability constants of Ca2+ and Mg2+ are similar with EDTA complexes.
Choose the correct answer from the options given below:

[30-Jan-2024 Shift 1]

Q.9 Correct

Q.9 In-correct

Q.9 Unattempt

The molecule/ion with square pyramidal shape is:

[30-Jan-2024 Shift 2]

The molecule/ion with square pyramidal shape is:

[30-Jan-2024 Shift 2]

Q.10 Correct

Q.10 In-correct

Q.10 Unattempt

The coordination geometry around the manganese in decacarbonyldimanganese(0)

[30-Jan-2024 Shift 2]

The coordination geometry around the manganese in decacarbonyldimanganese(0)

[30-Jan-2024 Shift 2]

Q.11 Correct

Q.11 In-correct

Q.11 Unattempt

Number of complexes which show optical isomerism among the following is
‌ cis ‌−[Cr(ox)2‌Cl2]3−,[Co(en)3]3+
cis−[Pt(en)2‌Cl2]2+,cis−[Co(en)2‌Cl2]+
trans−[Pt(en)2‌Cl2]2+,trans−[Cr(ox)2‌Cl2]3−

[30-Jan-2024 Shift 2]

Number of complexes which show optical isomerism among the following is
‌ cis ‌−[Cr(ox)2‌Cl2]3−,[Co(en)3]3+
cis−[Pt(en)2‌Cl2]2+,cis−[Co(en)2‌Cl2]+
trans−[Pt(en)2‌Cl2]2+,trans−[Cr(ox)2‌Cl2]3−

[30-Jan-2024 Shift 2]

Q.12 Correct

Q.12 In-correct

Q.12 Unattempt

The correct statements from following are:
A. The strength of anionic ligands can be explained by crystal field theory.
B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds.
C. The hybridization involved in formation of [Ni(CN)4]2− complex is dsp2.
D. The number of possible isomer(s) of cis- [PtCl2(en)2]2+ is one
Choose the correct answer from the options given below:

[31-Jan-2024 Shift 1]

The correct statements from following are:
A. The strength of anionic ligands can be explained by crystal field theory.
B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds.
C. The hybridization involved in formation of [Ni(CN)4]2− complex is dsp2.
D. The number of possible isomer(s) of cis- [PtCl2(en)2]2+ is one
Choose the correct answer from the options given below:

[31-Jan-2024 Shift 1]

Q.13 Correct

Q.13 In-correct

Q.13 Unattempt

Select the option with correct property -

[31-Jan-2024 Shift 2]

Select the option with correct property -

[31-Jan-2024 Shift 2]

Q.14 Correct

Q.14 In-correct

Q.14 Unattempt

Choose the correct answer from the options given below :

[31-Jan-2024 Shift 2]

Choose the correct answer from the options given below :

[31-Jan-2024 Shift 2]

Q.15 Correct

Q.15 In-correct

Q.15 Unattempt

Which of the following complex is homoleptic?

[1-Feb-2024 Shift 1]

Which of the following complex is homoleptic?

Given below are two statements:
Statement (I): A solution of [Ni(H2O)6]2+ is green in colour.
Statement (II): A solution of [Ni(CN)4]2− is colourless.
In the light of the above statements, choose the most appropriate answer from the options given below:

[1-Feb-2024 Shift 1]

Given below are two statements:
Statement (I): A solution of [Ni(H2O)6]2+ is green in colour.
Statement (II): A solution of [Ni(CN)4]2− is colourless.
In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements :
Statement (I) : Dimethyl glyoxime forms a sixmembered covalent chelate when treated with NiCl2 solution in presence of NH4‌OH.
Statement (II) : Prussian blue precipitate contains iron both in (+2) and (+3) oxidation states. In the light of the above statements, choose the most appropriate answer from the options given below:

[1-Feb-2024 Shift 2]

Given below are two statements :
Statement (I) : Dimethyl glyoxime forms a sixmembered covalent chelate when treated with NiCl2 solution in presence of NH4‌OH.
Statement (II) : Prussian blue precipitate contains iron both in (+2) and (+3) oxidation states. In the light of the above statements, choose the most appropriate answer from the options given below:

[Co(NH3)6]3+ and [CoF6]3− are respectively known as:

[1-Feb-2024 Shift 2]

[Co(NH3)6]3+ and [CoF6]3− are respectively known as:

1L,0.02M solution of [Co(NH3)5‌SO4]‌Br is mixed with 1L,0.02M solution of [Co(NH3)5‌Br]SO4. The resulting solution is divided into two equal parts (X) and treated with excess AgNO3 solution and BaCl2 solution respectively as shown below:
1L‌Solution(X)+AgNO3 solution (excess) →Y
1L Solution (X)+BaCl2 solution (excess) →Z
The number of moles of Y and Z respectively are

[30-Jan-2023 Shift 2]

1L,0.02M solution of [Co(NH3)5‌SO4]‌Br is mixed with 1L,0.02M solution of [Co(NH3)5‌Br]SO4. The resulting solution is divided into two equal parts (X) and treated with excess AgNO3 solution and BaCl2 solution respectively as shown below:
1L‌Solution(X)+AgNO3 solution (excess) →Y
1L Solution (X)+BaCl2 solution (excess) →Z
The number of moles of Y and Z respectively are

[30-Jan-2023 Shift 2]

Q.20 Correct

Q.20 In-correct

Q.20 Unattempt

The Cl−Co−Cl bond angle values in a fac[Co(NH3)3‌Cl3] complex is/are:

[30-Jan-2023 Shift 2]

The Cl−Co−Cl bond angle values in a fac[Co(NH3)3‌Cl3] complex is/are:

[30-Jan-2023 Shift 2]

Q.21 Correct

Q.21 In-correct

Q.21 Unattempt

Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with cone HCl forms deep blue complex, Y which has a Z geometry. X,Y and Z, respectively, are

[31-Jan-2023 Shift 1]

Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with cone HCl forms deep blue complex, Y which has a Z geometry. X,Y and Z, respectively, are

[31-Jan-2023 Shift 1]

Q.22 Correct

Q.22 In-correct

Q.22 Unattempt

If the CFSE of [Ti(H2O)6]3+ is −96.0‌kJ∕mol, this complex will absorb maximum at wavelength ____ nm. (nearest integer)
Assume Planck's constant (h)=6.4×10−34‌Js Speed of light (c)=3.0×108m∕ s and Avogadro's constant (NA)=6×1023∕mol

[31-Jan-2023 Shift 2]

If the CFSE of [Ti(H2O)6]3+ is −96.0‌kJ∕mol, this complex will absorb maximum at wavelength ____ nm. (nearest integer)
Assume Planck's constant (h)=6.4×10−34‌Js Speed of light (c)=3.0×108m∕ s and Avogadro's constant (NA)=6×1023∕mol

[31-Jan-2023 Shift 2]

Q.23 Correct

Q.23 In-correct

Q.23 Unattempt

Match List I with List II

Choose the correct answer from the options given below :-

[25-Jan-2023 Shift 2]

Match List I with List II

Choose the correct answer from the options given below :-

[25-Jan-2023 Shift 2]

Q.24 Correct

Q.24 In-correct

Q.24 Unattempt

Total number of moles of AgCl precipitated on addition of excess of AgNO3 to one mole each of the following complexes [Co(NH3)4‌Cl2]‌Cl, [Ni(H2O)6]Cl2,[Pt(NH3)2‌Cl2] and [Pd(NH3)4]Cl2 is

[25-Jan-2023 Shift 2]

Total number of moles of AgCl precipitated on addition of excess of AgNO3 to one mole each of the following complexes [Co(NH3)4‌Cl2]‌Cl, [Ni(H2O)6]Cl2,[Pt(NH3)2‌Cl2] and [Pd(NH3)4]Cl2 is

[25-Jan-2023 Shift 2]

Q.25 Correct

Q.25 In-correct

Q.25 Unattempt

Chiral complex from the following is:
Here en = ethylene diamine

[29-Jan-2023 Shift 1]

Chiral complex from the following is:
Here en = ethylene diamine

[29-Jan-2023 Shift 1]

Q.26 Correct

Q.26 In-correct

Q.26 Unattempt

The sum of bridging carbonyls in W(CO)6 and Mn2 (CO)10 is _______.

[29-Jan-2023 Shift 1]

The sum of bridging carbonyls in W(CO)6 and Mn2 (CO)10 is _______.

[29-Jan-2023 Shift 1]

Q.27 Correct

Q.27 In-correct

Q.27 Unattempt

Correct order of spin only magnetic moment of the following complex ions is:
(Given At. No. Fe: 26, Co:27)

[29-Jan-2023 Shift 2]

Correct order of spin only magnetic moment of the following complex ions is:
(Given At. No. Fe: 26, Co:27)

[29-Jan-2023 Shift 2]

Q.28 Correct

Q.28 In-correct

Q.28 Unattempt

The denticity of the ligand present in the Fehling's reagent is _______.
Denticity =2

[29-Jan-2023 Shift 2]

The denticity of the ligand present in the Fehling's reagent is _______.
Denticity =2

[29-Jan-2023 Shift 2]

Q.29 Correct

Q.29 In-correct

Q.29 Unattempt

Which of the following is correct order of ligand field strength?

[30-Jan-2023 Shift 1]

Which of the following is correct order of ligand field strength?

[30-Jan-2023 Shift 1]

Q.30 Correct

Q.30 In-correct

Q.30 Unattempt

To inhibit the growth of tumours, identify the compounds used from the following:
(A) EDTA
(B) Coordination Compounds of Pt
(C) D-Penicillamine
(D) Cis - Platin
Choose the correct answer from the option given below:

[30-Jan-2023 Shift 1]

To inhibit the growth of tumours, identify the compounds used from the following:
(A) EDTA
(B) Coordination Compounds of Pt
(C) D-Penicillamine
(D) Cis - Platin
Choose the correct answer from the option given below:

[30-Jan-2023 Shift 1]

Q.31 Correct

Q.31 In-correct

Q.31 Unattempt

The primary and secondary valencies of cobalt respectively in [Co(NH3)5‌Cl]Cl2 are :

[24-Jan-2023 Shift 1]

The primary and secondary valencies of cobalt respectively in [Co(NH3)5‌Cl]Cl2 are :

[24-Jan-2023 Shift 1]

Q.32 Correct

Q.32 In-correct

Q.32 Unattempt

The d-electronic configuration of [CoCl4]2− in tetrahedral crystal field is emt2‌n. Sum of ' m ' and 'number of unpaired electrons is_____

[24-Jan-2023 Shift 1]

The d-electronic configuration of [CoCl4]2− in tetrahedral crystal field is emt2‌n. Sum of ' m ' and 'number of unpaired electrons is_____

[24-Jan-2023 Shift 1]

Q.33 Correct

Q.33 In-correct

Q.33 Unattempt

Which of the following cannot be explained by crystal field theory?

[24-Jan-2023 Shift 2]

Which of the following cannot be explained by crystal field theory?

[24-Jan-2023 Shift 2]

Q.34 Correct

Q.34 In-correct

Q.34 Unattempt

Identify the correct statements about alkali metals.
A. The order of standard reduction potential (M+∣M) for alkali metal ions is Na>Rb>Li.
B. CsI is highly soluble in water.
C. Lithium carbonate is highly stable to heat.
D. Potassium dissolved in concentrated liquid ammonia is blue in colour and paramagnetic.
E. All the alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below

[24-Jan-2023 Shift 2]

Identify the correct statements about alkali metals.
A. The order of standard reduction potential (M+∣M) for alkali metal ions is Na>Rb>Li.
B. CsI is highly soluble in water.
C. Lithium carbonate is highly stable to heat.
D. Potassium dissolved in concentrated liquid ammonia is blue in colour and paramagnetic.
E. All the alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below

[24-Jan-2023 Shift 2]

Q.35 Correct

Q.35 In-correct

Q.35 Unattempt

The number of paramagnetic species from the following is ______.
‌[Ni(CN)4]2−,[Ni(CO)4],[NiCl4]2−
‌[Fe(CN)6]4−,[Cu(NH3)4]2+
‌[Fe(CN)6]3−‌ and ‌[Fe(H2O)6]2+

[25-Jan-2023 Shift 1]

The number of paramagnetic species from the following is ______.
‌[Ni(CN)4]2−,[Ni(CO)4],[NiCl4]2−
‌[Fe(CN)6]4−,[Cu(NH3)4]2+
‌[Fe(CN)6]3−‌ and ‌[Fe(H2O)6]2+

[25-Jan-2023 Shift 1]

Q.36 Correct

Q.36 In-correct

Q.36 Unattempt

Which of the following complex will show largest splitting of d-orbitals?

[1-Feb-2023 Shift 1]

Which of the following complex will show largest splitting of d-orbitals?

The complex cation which has two isomers is :

[1-Feb-2023 Shift 2]

The complex cation which has two isomers is :

The spin only magnetic moment of [Mn(H2O)6]2+ complexes is _______ B.M. (Nearest integer)
(Given : Atomic no. of Mn is 25 )

[1-Feb-2023 Shift 2]

The spin only magnetic moment of [Mn(H2O)6]2+ complexes is _______ B.M. (Nearest integer)
(Given : Atomic no. of Mn is 25 )

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The spin only magnetic moment value for [Fe(CN)6]3− is 1.74‌BM, whereas for [Fe(H2O)6]3+ is 5.92‌BM.
Reason R : In both complexes, Fe is present in +3 oxidation state.
In the light of the above statements, choose the correct answer from the options given below:

[6-Apr-2023 shift 1]

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: The spin only magnetic moment value for [Fe(CN)6]3− is 1.74‌BM, whereas for [Fe(H2O)6]3+ is 5.92‌BM.
Reason R : In both complexes, Fe is present in +3 oxidation state.
In the light of the above statements, choose the correct answer from the options given below:

Number of ambidentate ligands in a representative metal complex [M(en)(SCN)4] is
‌ [en = ethylenediamine ‌]

[6-Apr-2023 shift 1]

Number of ambidentate ligands in a representative metal complex [M(en)(SCN)4] is
‌ [en = ethylenediamine ‌]

The IUPAC name of K3[Co(C2O4)3] is :-

[6-Apr-2023 shift 2]

The IUPAC name of K3[Co(C2O4)3] is :-

Given below are two statements : one is labelled as
"Assertion A" and the other is labelled as "Reason R".
Assertion A : In the complex Ni(CO)4 and Fe(CO)5, the metals have zero oxidation state.
Reason R : Low oxidation states are found when a complex has ligands capable of π-donor character in addition to the σ-bonding.
In the light of the above statements, choose the most appropriate answer from the option given below.

[6-Apr-2023 shift 2]

Given below are two statements : one is labelled as
"Assertion A" and the other is labelled as "Reason R".
Assertion A : In the complex Ni(CO)4 and Fe(CO)5, the metals have zero oxidation state.
Reason R : Low oxidation states are found when a complex has ligands capable of π-donor character in addition to the σ-bonding.
In the light of the above statements, choose the most appropriate answer from the option given below.

Element not present in Nessler's reagent is:-

[6-Apr-2023 shift 2]

Element not present in Nessler's reagent is:-

Which of the following complex is octahedral, diamagnetic and the most stable?

[8-Apr-2023 shift 1]

Which of the following complex is octahedral, diamagnetic and the most stable?

The correct order of spin only magnetic moments for the following complex ions is

[8-Apr-2023 shift 1]

The correct order of spin only magnetic moments for the following complex ions is

Match list I with list II

Choose the correct answer from the options given below:

[8-Apr-2023 shift 2]

Match list I with list II

Choose the correct answer from the options given below:

The observed magnetic moment of the complex [Mn(x‌NCS)6]x− is 6.06‌BM. The numerical value of x is _______.

[8-Apr-2023 shift 2]

The observed magnetic moment of the complex [Mn(x‌NCS)6]x− is 6.06‌BM. The numerical value of x is _______.

The sum of oxidation state of the metals in Fe(CO)5,VO2+ and WO3 is ______

[8-Apr-2023 shift 2]

The sum of oxidation state of the metals in Fe(CO)5,VO2+ and WO3 is ______

The octahedral diamagnetic low spin complex among the following is

[10-Apr-2023 shift 1]

The octahedral diamagnetic low spin complex among the following is

[10-Apr-2023 shift 1]

Q.50 Correct

Q.50 In-correct

Q.50 Unattempt

In potassium ferrocyanide, there are _______ pairs of electrons in the t2g set of orbitals.

[10-Apr-2023 shift 1]

In potassium ferrocyanide, there are _______ pairs of electrons in the t2g set of orbitals.

[10-Apr-2023 shift 1]

Q.51 Correct

Q.51 In-correct

Q.51 Unattempt

Match List I with List II

Choose the correct answer from the options given below:

[10-Apr-2023 shift 2]

Match List I with List II

Choose the correct answer from the options given below:

[10-Apr-2023 shift 2]

Q.52 Correct

Q.52 In-correct

Q.52 Unattempt

The correct order of the number of unpaired electrons in the given complexes is
A. [Fe(CN)6]3−
B. [FeF6]3−
C. [CoF6]3−
D. [Cr(‌ oxalate ‌)3]3−
E. [Ni(CO)4]
Choose the correct answer from the options given below:

[10-Apr-2023 shift 2]

The correct order of the number of unpaired electrons in the given complexes is
A. [Fe(CN)6]3−
B. [FeF6]3−
C. [CoF6]3−
D. [Cr(‌ oxalate ‌)3]3−
E. [Ni(CO)4]
Choose the correct answer from the options given below:

[10-Apr-2023 shift 2]

Q.53 Correct

Q.53 In-correct

Q.53 Unattempt

The complex that dissolves in water is

[11-Apr-2023 shift 1]

The complex that dissolves in water is

[11-Apr-2023 shift 1]

Q.54 Correct

Q.54 In-correct

Q.54 Unattempt

The set which does not have ambidentate ligand (s) is

[11-Apr-2023 shift 1]

The set which does not have ambidentate ligand (s) is

[11-Apr-2023 shift 1]

Q.55 Correct

Q.55 In-correct

Q.55 Unattempt

Which of the following complex has a possibility to exist as meridional isomer?

[11-Apr-2023 shift 1]

Which of the following complex has a possibility to exist as meridional isomer?

[11-Apr-2023 shift 1]

Q.56 Correct

Q.56 In-correct

Q.56 Unattempt

The ratio of spin-only magnetic moment values µ‌eff ‌[Cr(CN)6]3−∕µ‌eff ‌[Cr(H2O)6]3+ is ________.

[11-Apr-2023 shift 1]

The ratio of spin-only magnetic moment values µ‌eff ‌[Cr(CN)6]3−∕µ‌eff ‌[Cr(H2O)6]3+ is ________.

[11-Apr-2023 shift 1]

Q.57 Correct

Q.57 In-correct

Q.57 Unattempt

If Ni2+ is replaced by Pt2+ in the complex [NiCl2Br2]2−, which of the following properties are expected to get changed?
A. Geometry
B. Geometrical isomerism
C. Optical isomerism
D. Magnetic properties

[11-Apr-2023 shift 2]

If Ni2+ is replaced by Pt2+ in the complex [NiCl2Br2]2−, which of the following properties are expected to get changed?
A. Geometry
B. Geometrical isomerism
C. Optical isomerism
D. Magnetic properties

[11-Apr-2023 shift 2]

Q.58 Correct

Q.58 In-correct

Q.58 Unattempt

Match List I with List II

Choose the correct answer from the options given below:

[11-Apr-2023 shift 2]

Match List I with List II

Choose the correct answer from the options given below:

[11-Apr-2023 shift 2]

Q.59 Correct

Q.59 In-correct

Q.59 Unattempt

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : [CoCl(NH3)5]2+ absorbs at lower wavelength of light with respect to [CoCl(NH3)5(H2O)]3+
Reason R : It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.
In the light of the above statements, choose the correct answer from the options given below:

[11-Apr-2023 shift 2]

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : [CoCl(NH3)5]2+ absorbs at lower wavelength of light with respect to [CoCl(NH3)5(H2O)]3+
Reason R : It is because the wavelength of the light absorbed depends on the oxidation state of the metal ion.
In the light of the above statements, choose the correct answer from the options given below:

[11-Apr-2023 shift 2]

Q.60 Correct

Q.60 In-correct

Q.60 Unattempt

The magnetic moment is measured in Bohr Magneton (BM). Spin only magnetic moment of Fe in [Fe(H2O)6]3+ and [Fe(CN)6]3− complexes respectively is:

[11-Apr-2023 shift 2]

The magnetic moment is measured in Bohr Magneton (BM). Spin only magnetic moment of Fe in [Fe(H2O)6]3+ and [Fe(CN)6]3− complexes respectively is:

[11-Apr-2023 shift 2]

Q.61 Correct

Q.61 In-correct

Q.61 Unattempt

Match List I with List II

Choose the correct answer from the options given below:

[12-Apr-2023 shift 1]

Match List I with List II

Choose the correct answer from the options given below:

[12-Apr-2023 shift 1]

Q.62 Correct

Q.62 In-correct

Q.62 Unattempt

The mismatched combinations are
A. Chlorophyll - Co
B. Water hardness - EDTA
C. Photography −[Ag(CN)2]−
D. Wilkinson catalyst - [(Ph3P)3‌RhCl]
E. Chelating ligand - D-Penicillamine
Choose the correct answer from the options given below :

[13-Apr-2023 shift 1]

The mismatched combinations are
A. Chlorophyll - Co
B. Water hardness - EDTA
C. Photography −[Ag(CN)2]−
D. Wilkinson catalyst - [(Ph3P)3‌RhCl]
E. Chelating ligand - D-Penicillamine
Choose the correct answer from the options given below :

[13-Apr-2023 shift 1]

Q.63 Correct

Q.63 In-correct

Q.63 Unattempt

The covalency and oxidation state respectively of boron in [BF4]−, are :

[13-Apr-2023 shift 2]

The covalency and oxidation state respectively of boron in [BF4]−, are :

[13-Apr-2023 shift 2]

Q.64 Correct

Q.64 In-correct

Q.64 Unattempt

Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

[13-Apr-2023 shift 2]

Which of the following complexes will exhibit maximum attraction to an applied magnetic field?

[13-Apr-2023 shift 2]

Q.65 Correct

Q.65 In-correct

Q.65 Unattempt

The total number of stereoisomers for the complex [Cr(ox)2‌ClBr]3−( where ox = oxalate ) is :

[13-Apr-2023 shift 2]

The total number of stereoisomers for the complex [Cr(ox)2‌ClBr]3−( where ox = oxalate ) is :

[13-Apr-2023 shift 2]

Q.66 Correct

Q.66 In-correct

Q.66 Unattempt

The complex with highest magnitude of crystal field splitting energy (∆0) is

[15-Apr-2023 shift 1]

The complex with highest magnitude of crystal field splitting energy (∆0) is

[15-Apr-2023 shift 1]

Q.67 Correct

Q.67 In-correct

Q.67 Unattempt

The volume (in mL ) of 0.1MAgNO3 required for complete precipitation of chloride ions present in 20‌mL of 0.01M solution of [Cr(H2O)5‌Cl]Cl2 as silver chloride is _______.

[15-Apr-2023 shift 1]

The volume (in mL ) of 0.1MAgNO3 required for complete precipitation of chloride ions present in 20‌mL of 0.01M solution of [Cr(H2O)5‌Cl]Cl2 as silver chloride is _______.

[15-Apr-2023 shift 1]

Q.68 Correct

Q.68 In-correct

Q.68 Unattempt

The homoleptic and octahedral complex of Co2+ and H2O has _______ unparied electrons(s) in the t2g set of orbitals.

[15-Apr-2023 shift 1]

The homoleptic and octahedral complex of Co2+ and H2O has _______ unparied electrons(s) in the t2g set of orbitals.

[15-Apr-2023 shift 1]

Q.69 Correct

Q.69 In-correct

Q.69 Unattempt

Choose the most appropriate answer from the options given below :

[24-Jun-2022-Shift-1]

Choose the most appropriate answer from the options given below :

[24-Jun-2022-Shift-1]

Q.70 Correct

Q.70 In-correct

Q.70 Unattempt

In the cobalt-carbonyl complex : [CO2(CO)8], number of Co−Co bonds is "X" and terminal CO ligands is "Y". X+Y=

[24-Jun-2022-Shift-1]

In the cobalt-carbonyl complex : [CO2(CO)8], number of Co−Co bonds is "X" and terminal CO ligands is "Y". X+Y=

[24-Jun-2022-Shift-1]

Q.71 Correct

Q.71 In-correct

Q.71 Unattempt

Transition metal complex with highest value of crystal field splitting (∆0) will be

[24-Jun-2022-Shift-2]

Transition metal complex with highest value of crystal field splitting (∆0) will be

[24-Jun-2022-Shift-2]

Q.72 Correct

Q.72 In-correct

Q.72 Unattempt

White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :

[25-Jun-2022-Shift-1]

White precipitate of AgCl dissolves in aqueous ammonia solution due to formation of :

[25-Jun-2022-Shift-1]

Q.73 Correct

Q.73 In-correct

Q.73 Unattempt

If [Cu(H2O)4]2+ absorbs a light of wavelength 600‌nm for d−d transition, then the value of octahedral crystal field splitting energy for [Cu(H2O)6]2+ will be ____×10−21J. [Nearest Integer]
(Given : h=6.63×10−34‌Js and c=3.08×108ms−1 )

[25-Jun-2022-Shift-1]

If [Cu(H2O)4]2+ absorbs a light of wavelength 600‌nm for d−d transition, then the value of octahedral crystal field splitting energy for [Cu(H2O)6]2+ will be ____×10−21J. [Nearest Integer]
(Given : h=6.63×10−34‌Js and c=3.08×108ms−1 )

[25-Jun-2022-Shift-1]

Q.74 Correct

Q.74 In-correct

Q.74 Unattempt

Amongst FeCl3⋅3H2O,K3[Fe(CN)6] and [Co(NH3)6]Cl3, the spin-only magnetic moment value of the innerorbital complex that absorbs light at shortest wavelength is_____ B.M. [nearest integer]

[25-Jun-2022-Shift-2]

Amongst FeCl3⋅3H2O,K3[Fe(CN)6] and [Co(NH3)6]Cl3, the spin-only magnetic moment value of the innerorbital complex that absorbs light at shortest wavelength is_____ B.M. [nearest integer]

[25-Jun-2022-Shift-2]

Q.75 Correct

Q.75 In-correct

Q.75 Unattempt

Which statement is not true with respect to nitrate ion test?

[26-Jun-2022-Shift-1]

Which statement is not true with respect to nitrate ion test?

[26-Jun-2022-Shift-1]

Q.76 Correct

Q.76 In-correct

Q.76 Unattempt

The spin-only magnetic moment value of an octahedral complex among CoCl3⋅4NH3,NiCl2⋅6H2O and PtCl4⋅2‌HCl, which upon reaction with excess of AgNO3 gives 2 moles of AgCl is ____B.M. (Nearest integer)

[26-Jun-2022-Shift-1]

The spin-only magnetic moment value of an octahedral complex among CoCl3⋅4NH3,NiCl2⋅6H2O and PtCl4⋅2‌HCl, which upon reaction with excess of AgNO3 gives 2 moles of AgCl is ____B.M. (Nearest integer)

[26-Jun-2022-Shift-1]

Q.77 Correct

Q.77 In-correct

Q.77 Unattempt

Reaction of [Co(H2O)6]2+ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in t2g-orbitals of the product is__

[26-Jun-2022-Shift-2]

Reaction of [Co(H2O)6]2+ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in t2g-orbitals of the product is__

[26-Jun-2022-Shift-2]

Q.78 Correct

Q.78 In-correct

Q.78 Unattempt

Which of the following will have maximum stabilization due to crystal field?

[27-Jun-2022-Shift-1]

Which of the following will have maximum stabilization due to crystal field?

[27-Jun-2022-Shift-1]

Q.79 Correct

Q.79 In-correct

Q.79 Unattempt

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers : Mn=25;Fe=26 )
A. [FeF6]3−
B. [Fe(CN)6]3−
C. [MnCl6]3− (high spin)
D. [Mn(CN)6]3−
Choose the correct answer from the options given below :

[27-Jun-2022-Shift-2]

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers : Mn=25;Fe=26 )
A. [FeF6]3−
B. [Fe(CN)6]3−
C. [MnCl6]3− (high spin)
D. [Mn(CN)6]3−
Choose the correct answer from the options given below :

[27-Jun-2022-Shift-2]

Q.80 Correct

Q.80 In-correct

Q.80 Unattempt

Given below are two statements :
Statement I : [Ni(CN)4]2− is square planar and diamagnetic complex, with dsp ‌2 hybridization for Ni but [Ni(CO)4] is tetrahedral, paramagnetic and with sp3-hybridication for Ni.
Statement II : [NiCl4]2− and [Ni(CO)4] both have same d-electron configuration have same geometry and are paramagnetic.
In light the above statements, choose the correct answer from the options given below :

[28-Jun-2022-Shift-1]

Given below are two statements :
Statement I : [Ni(CN)4]2− is square planar and diamagnetic complex, with dsp ‌2 hybridization for Ni but [Ni(CO)4] is tetrahedral, paramagnetic and with sp3-hybridication for Ni.
Statement II : [NiCl4]2− and [Ni(CO)4] both have same d-electron configuration have same geometry and are paramagnetic.
In light the above statements, choose the correct answer from the options given below :

[28-Jun-2022-Shift-1]

Q.81 Correct

Q.81 In-correct

Q.81 Unattempt

Number of complexes which will exhibit synergic bonding amongst, [Cr(CO)6],[Mn(CO)5] and [Mn2(CO)10] is___

[28-Jun-2022-Shift-1]

Number of complexes which will exhibit synergic bonding amongst, [Cr(CO)6],[Mn(CO)5] and [Mn2(CO)10] is___

[28-Jun-2022-Shift-1]

Q.82 Correct

Q.82 In-correct

Q.82 Unattempt

[Fe(CN)6]4−
[Fe(CN)6]3−
[Ti(CN)6]3−
[Ni(CN)4]2−
[Co(CN)6]3−
Among the given complexes, number of paramagnetic complexes is____

[28-Jun-2022-Shift-2]

[Fe(CN)6]4−
[Fe(CN)6]3−
[Ti(CN)6]3−
[Ni(CN)4]2−
[Co(CN)6]3−
Among the given complexes, number of paramagnetic complexes is____

[28-Jun-2022-Shift-2]

Q.83 Correct

Q.83 In-correct

Q.83 Unattempt

(a) CoCl3⋅4NH3,
(b) CoCl3.5NH3,
(c) CoCl3⋅6NH3 and
(d) CoCl(NO3)2⋅5NH3.
Number of complex(es) which will exist in cis-trans form is/are_______

[28-Jun-2022-Shift-2]

(a) CoCl3⋅4NH3,
(b) CoCl3.5NH3,
(c) CoCl3⋅6NH3 and
(d) CoCl(NO3)2⋅5NH3.
Number of complex(es) which will exist in cis-trans form is/are_______

[28-Jun-2022-Shift-2]

Q.84 Correct

Q.84 In-correct

Q.84 Unattempt

Given below are two statements.
- Statement I : In CuSO4⋅5H2O,Cu−O bonds are present.
- Statement II : In CuSO4⋅5H2O, ligands coordinating with Cu(II) ion are O-and S-based ligands.
In the light of the above statements, choose the correct answer from the options given below.

[29-Jun-2022-Shift-2]

Given below are two statements.
- Statement I : In CuSO4⋅5H2O,Cu−O bonds are present.
- Statement II : In CuSO4⋅5H2O, ligands coordinating with Cu(II) ion are O-and S-based ligands.
In the light of the above statements, choose the correct answer from the options given below.

[29-Jun-2022-Shift-2]

Q.85 Correct

Q.85 In-correct

Q.85 Unattempt

Spin only magnetic moment of [MnBr6]4− is _____ B.M. (round off to the closest integer)

[29-Jun-2022-Shift-2]

Spin only magnetic moment of [MnBr6]4− is _____ B.M. (round off to the closest integer)

[29-Jun-2022-Shift-2]

Q.86 Correct

Q.86 In-correct

Q.86 Unattempt

Consider the following metal complexes:
[Co(NH3)6]3+
[CoCl(NH3)5]2+
[Co(CN)6]3−
[Co(NH3)5(H2O)]3+
The spin-only magnetic moment value of the complexthat absorbes light with shortest wavelength is
B. M. (Nearest integer)

[25-Jul-2022-Shift-1]

Consider the following metal complexes:
[Co(NH3)6]3+
[CoCl(NH3)5]2+
[Co(CN)6]3−
[Co(NH3)5(H2O)]3+
The spin-only magnetic moment value of the complexthat absorbes light with shortest wavelength is
B. M. (Nearest integer)

[25-Jul-2022-Shift-1]

Q.87 Correct

Q.87 In-correct

Q.87 Unattempt

The correct order of energy of absorption for the following metal complexes is
A:[Ni(en)3]2+,B:[Ni(NH3)6]2+,C:[Ni(H2O)6]2+

[25-Jul-2022-Shift-2]

The correct order of energy of absorption for the following metal complexes is
A:[Ni(en)3]2+,B:[Ni(NH3)6]2+,C:[Ni(H2O)6]2+

[25-Jul-2022-Shift-2]

Q.88 Correct

Q.88 In-correct

Q.88 Unattempt

The difference between spin only magnetic moment values of [Co(H2O)6]Cl2 and [Cr(H2O)6]Cl3 is ________.

[26-Jul-2022-Shift-1]

The difference between spin only magnetic moment values of [Co(H2O)6]Cl2 and [Cr(H2O)6]Cl3 is ________.

[26-Jul-2022-Shift-1]

Q.89 Correct

Q.89 In-correct

Q.89 Unattempt

The metal complex that is diamagnetic is (Atomic number: Fe,26;Cu,29 )

[26-Jul-2022-Shift-2]

The metal complex that is diamagnetic is (Atomic number: Fe,26;Cu,29 )

[26-Jul-2022-Shift-2]

Q.90 Correct

Q.90 In-correct

Q.90 Unattempt

The conductivity of a solution of complex with formula CoCl3(NH3)4 corresponds to 1:1 electrolyte, then the primary valency of central metal ion is _______.

[27-Jul-2022-Shift-1]

The conductivity of a solution of complex with formula CoCl3(NH3)4 corresponds to 1:1 electrolyte, then the primary valency of central metal ion is _______.

[27-Jul-2022-Shift-1]

Q.91 Correct

Q.91 In-correct

Q.91 Unattempt

Low oxidation state of metals in their complexes are common when ligands:

[27-Jul-2022-Shift-2]

Low oxidation state of metals in their complexes are common when ligands:

[27-Jul-2022-Shift-2]

Q.92 Correct

Q.92 In-correct

Q.92 Unattempt

Fe3+ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :

[27-Jul-2022-Shift-2]

Fe3+ cation gives a prussian blue precipitate on addition of potassium ferrocyanide solution due to the formation of :

[27-Jul-2022-Shift-2]

Q.93 Correct

Q.93 In-correct

Q.93 Unattempt

The spin only magnetic moment of the complex present in Fehling's reagent is _________ B.M.
(Nearest integer).

[27-Jul-2022-Shift-2]

The spin only magnetic moment of the complex present in Fehling's reagent is _________ B.M.
(Nearest integer).

[27-Jul-2022-Shift-2]

Q.94 Correct

Q.94 In-correct

Q.94 Unattempt

Total number of relatively more stable isomer(s) possible for octahedral complex [Cu(en)2(SCN)2] will be _______.

[28-Jul-2022-Shift-1]

Total number of relatively more stable isomer(s) possible for octahedral complex [Cu(en)2(SCN)2] will be _______.

[28-Jul-2022-Shift-1]

Q.95 Correct

Q.95 In-correct

Q.95 Unattempt

Match List I with List II

Choose the correct answer from the options given below:

[28-Jul-2022-Shift-2]

Match List I with List II

Choose the correct answer from the options given below:

[28-Jul-2022-Shift-2]

Q.96 Correct

Q.96 In-correct

Q.96 Unattempt

[Fe(CN)6]3− should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (−) _______ ∆0. (Nearest integer)

[29-Jul-2022-Shift-1]

[Fe(CN)6]3− should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (−) _______ ∆0. (Nearest integer)

[29-Jul-2022-Shift-1]

Q.97 Correct

Q.97 In-correct

Q.97 Unattempt

Octahedral complexes of copper(II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will show the maximum structural distortion? (en - ethylenediamine; .H2N−CH2−CH2−NH2)

[29-Jul-2022-Shift-2]

Octahedral complexes of copper(II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will show the maximum structural distortion? (en - ethylenediamine; .H2N−CH2−CH2−NH2)

[29-Jul-2022-Shift-2]

Q.98 Correct

Q.98 In-correct

Q.98 Unattempt

Sum of oxidation state (magnitude) and coordination number of cobalt in Na⋅[Co(bpy)‌Cl4] is ________.

[29-Jul-2022-Shift-2]

Sum of oxidation state (magnitude) and coordination number of cobalt in Na⋅[Co(bpy)‌Cl4] is ________.

[29-Jul-2022-Shift-2]

Q.99 Correct

Q.99 In-correct

Q.99 Unattempt

The number of stereoisomers possible for [Co(OX)2(Br)(NH3)]2− is ......... .[ox =Oxalate].

[26 Feb 2021 Shift 2]

The number of stereoisomers possible for [Co(OX)2(Br)(NH3)]2− is ......... .[ox =Oxalate].

[26 Feb 2021 Shift 2]

Q.100 Correct

Q.100 In-correct

Q.100 Unattempt

Given below are two statements.
Statement I The identification of Ni2+ is carried out by dimethyl glyoxime in the presence of NH4OH.
Statement II The dimethyl glyoxime is a bidentate neutral ligand.
In the light of the above statements, choose the correct answer from the options given below.

[25 Feb 2021 Shift 2]

Given below are two statements.
Statement I The identification of Ni2+ is carried out by dimethyl glyoxime in the presence of NH4OH.
Statement II The dimethyl glyoxime is a bidentate neutral ligand.
In the light of the above statements, choose the correct answer from the options given below.

[25 Feb 2021 Shift 2]

Q.101 Correct

Q.101 In-correct

Q.101 Unattempt

The stepwise formation of [Cu(NH3)4]2+ is given below

Cu2++NH3

K1

⇌

[Cu(NH3)2]2+

[Cu(NH3)]2++NH3

K2

⇌

[Cu(NH3)2]2+

[Cu(NH3)2]2++NH3

K3

⇌

[Cu(NH3)3]2+

[Cu(NH3)3]2++NH3

K4

⇌

[Cu(NH3)4]2+

The value of stability constants K1,K2,K3 and K4 are 104,1.58×103,5×102 and 102 respectively. The overall equilibrium constants for dissociation of [Cu(NH3)4]2+ is x×10−12. The value of x is___ (Rounded off to the nearest integer)

[24 Feb 2021 Shift 1]

The stepwise formation of [Cu(NH3)4]2+ is given below

Cu2++NH3

K1

⇌

[Cu(NH3)2]2+

[Cu(NH3)]2++NH3

K2

⇌

[Cu(NH3)2]2+

[Cu(NH3)2]2++NH3

K3

⇌

[Cu(NH3)3]2+

[Cu(NH3)3]2++NH3

K4

⇌

[Cu(NH3)4]2+

The value of stability constants K1,K2,K3 and K4 are 104,1.58×103,5×102 and 102 respectively. The overall equilibrium constants for dissociation of [Cu(NH3)4]2+ is x×10−12. The value of x is___ (Rounded off to the nearest integer)

[24 Feb 2021 Shift 1]

Q.102 Correct

Q.102 In-correct

Q.102 Unattempt

The correct structures of trans-[NiBr (PPh3)2] and meridonial-[ Co(NH3)3(NO2)3], respectively are

[18 Mar 2021 Shift 1]

The correct structures of trans-[NiBr (PPh3)2] and meridonial-[ Co(NH3)3(NO2)3], respectively are

[18 Mar 2021 Shift 1]

Q.103 Correct

Q.103 In-correct

Q.103 Unattempt

Match List-I and List-II.

[17 Mar 2021 Shift 2]

Match List-I and List-II.

[17 Mar 2021 Shift 2]

Q.104 Correct

Q.104 In-correct

Q.104 Unattempt

The correct pair(s) of the ambident nucleophiles is(are)
A. AgCN/KCN
B. RCOOAg/RCOOK
C. AgNO2/KNO2
D. Agl/Kl

[17 Mar 2021 Shift 2]

The correct pair(s) of the ambident nucleophiles is(are)
A. AgCN/KCN
B. RCOOAg/RCOOK
C. AgNO2/KNO2
D. Agl/Kl

[17 Mar 2021 Shift 2]

Q.105 Correct

Q.105 In-correct

Q.105 Unattempt

The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of COCl3⋅4NH3 is (Round off to the nearest integer).

[16 Mar 2021 Shift 1]

The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of COCl3⋅4NH3 is (Round off to the nearest integer).

[16 Mar 2021 Shift 1]

Q.106 Correct

Q.106 In-correct

Q.106 Unattempt

The total number of unpaired electrons present in the complex K3[Cr‌ (oxalate ‌)3] is________.

[18 Mar 2021 Shift 1]

The total number of unpaired electrons present in the complex K3[Cr‌ (oxalate ‌)3] is________.

[18 Mar 2021 Shift 1]

Q.107 Correct

Q.107 In-correct

Q.107 Unattempt

On complete reaction of FeCl3 with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is (Round off to the nearest integer).

[17 Mar 2021 Shift 2]

On complete reaction of FeCl3 with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is (Round off to the nearest integer).

[17 Mar 2021 Shift 2]

Q.108 Correct

Q.108 In-correct

Q.108 Unattempt

What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25 , in it's aqueous solution?

[17 Mar 2021 Shift 1]

What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25 , in it's aqueous solution?

[17 Mar 2021 Shift 1]

Q.109 Correct

Q.109 In-correct

Q.109 Unattempt

3 moles of metal complex with formula Co(en)2Cl3 gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is _____.
(Round off to the nearest integer)

[27 Jul 2021 Shift 2]

3 moles of metal complex with formula Co(en)2Cl3 gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is _____.
(Round off to the nearest integer)

[27 Jul 2021 Shift 2]

Q.110 Correct

Q.110 In-correct

Q.110 Unattempt

Given below are two statements:
Statement I : [Mn(CN)6]3−,[Fe(CN)6]3− and[Co(C2O4)3]3− are d2sp3 hybridised.
Statement II : [MnCl6]3− and [FeF6]3− are paramagnetic and have 4 and 5 unpaired electrons, respectively.
In the light of the above statements, choose the correct answer from the options given below :

[27 Jul 2021 Shift 2]

Given below are two statements:
Statement I : [Mn(CN)6]3−,[Fe(CN)6]3− and[Co(C2O4)3]3− are d2sp3 hybridised.
Statement II : [MnCl6]3− and [FeF6]3− are paramagnetic and have 4 and 5 unpaired electrons, respectively.
In the light of the above statements, choose the correct answer from the options given below :

[27 Jul 2021 Shift 2]

Q.111 Correct

Q.111 In-correct

Q.111 Unattempt

The number of geometrical isomers possible in triamminetrinitrocobalt (III) is X and in trioxalatochromate (III) is Y. Then the value of X + Y is _______.

[27 Jul 2021 Shift 1]

The number of geometrical isomers possible in triamminetrinitrocobalt (III) is X and in trioxalatochromate (III) is Y. Then the value of X + Y is _______.

[27 Jul 2021 Shift 1]

Q.112 Correct

Q.112 In-correct

Q.112 Unattempt

An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of compound A is reacted with AgNO3 [Carius Method], the percentage of chlorine in compound A is _______ when it forms 0.3849 g of AgCl. (Round off to the Nearest Integer)
(Atomic masses of Ag and Cl are 107.87 and 35.5 respectively)

[27 Jul 2021 Shift 1]

An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of compound A is reacted with AgNO3 [Carius Method], the percentage of chlorine in compound A is _______ when it forms 0.3849 g of AgCl. (Round off to the Nearest Integer)
(Atomic masses of Ag and Cl are 107.87 and 35.5 respectively)

[27 Jul 2021 Shift 1]

Q.113 Correct

Q.113 In-correct

Q.113 Unattempt

The number of geometrical isomers found in the metal complexes [PtCl2(NH3)2], [Ni(CO)4],‌‌‌[Ru(H2O)3Cl3] and [CoCl2(NH3)4]+ respectively, are :

[27 Jul 2021 Shift 1]

The number of geometrical isomers found in the metal complexes [PtCl2(NH3)2], [Ni(CO)4],‌‌‌[Ru(H2O)3Cl3] and [CoCl2(NH3)4]+ respectively, are :

[27 Jul 2021 Shift 1]

Q.114 Correct

Q.114 In-correct

Q.114 Unattempt

The type of hybridisation and magnetic property of the complex [MnCl6]3−, respectively, are:

[27 Jul 2021 Shift 1]

The type of hybridisation and magnetic property of the complex [MnCl6]3−, respectively, are:

[27 Jul 2021 Shift 1]

Q.115 Correct

Q.115 In-correct

Q.115 Unattempt

Which one of the following metal complexes is most stable?

[25 Jul 2021 Shift 2]

Which one of the following metal complexes is most stable?

[25 Jul 2021 Shift 2]

Q.116 Correct

Q.116 In-correct

Q.116 Unattempt

Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula CrCl3.3NH3.3H2O reacts with excess of silver nitrate. The number of chloride ions satisfying the secondary valency of the metal ion is _____.

[25 Jul 2021 Shift 1]

Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula CrCl3.3NH3.3H2O reacts with excess of silver nitrate. The number of chloride ions satisfying the secondary valency of the metal ion is _____.

[25 Jul 2021 Shift 1]

Q.117 Correct

Q.117 In-correct

Q.117 Unattempt

Which one of the following species responds to an external magnetic field?

[25 Jul 2021 Shift 1]

Which one of the following species responds to an external magnetic field?

[25 Jul 2021 Shift 1]

Q.118 Correct

Q.118 In-correct

Q.118 Unattempt

The total number of unpaired electrons present in [Co(NH3)6]Cl2 and [Co(NH3)6]Cl3 is

[22 Jul 2021 Shift 2]

The total number of unpaired electrons present in [Co(NH3)6]Cl2 and [Co(NH3)6]Cl3 is

[22 Jul 2021 Shift 2]

Q.119 Correct

Q.119 In-correct

Q.119 Unattempt

The correct order of intensity of colors of the compounds is:

[20 Jul 2021 Shift 1]

The correct order of intensity of colors of the compounds is:

[20 Jul 2021 Shift 1]

Q.120 Correct

Q.120 In-correct

Q.120 Unattempt

According to the valence bond theory the hybridization of central metal atom is dsp2 for which one of the following compounds?

[20 Jul 2021 Shift 1]

According to the valence bond theory the hybridization of central metal atom is dsp2 for which one of the following compounds?

[20 Jul 2021 Shift 1]

Q.121 Correct

Q.121 In-correct

Q.121 Unattempt

An aqueous solution of NiCl2 was heated with excess sodium cyanide in presence of strong oxidizing agent to form [Ni(CN)6]2−. The total change in number of unpaired electrons on metal centre is _______.

[20 Jul 2021 Shift 2]

An aqueous solution of NiCl2 was heated with excess sodium cyanide in presence of strong oxidizing agent to form [Ni(CN)6]2−. The total change in number of unpaired electrons on metal centre is _______.

[20 Jul 2021 Shift 2]

Q.122 Correct

Q.122 In-correct

Q.122 Unattempt

Spin only magnetic moment in BM of [Fe(CO)4(C2O4)]+is

[31 Aug 2021 Shift 2]

Spin only magnetic moment in BM of [Fe(CO)4(C2O4)]+is

[31 Aug 2021 Shift 2]

Q.123 Correct

Q.123 In-correct

Q.123 Unattempt

The denticity of an organic ligand, biuret is

[31 Aug 2021 Shift 1]

The denticity of an organic ligand, biuret is

[31 Aug 2021 Shift 1]

Q.124 Correct

Q.124 In-correct

Q.124 Unattempt

The number of optical isomers possible for [Cr(C2O4)3]3− is ...

[27 Aug 2021 Shift 2]

The number of optical isomers possible for [Cr(C2O4)3]3− is ...

[27 Aug 2021 Shift 2]

Q.125 Correct

Q.125 In-correct

Q.125 Unattempt

1‌mol of an octahedral metal complex with formula MCl3.2L on reaction with excess of AgNO3 gives 1‌mol of AgCl. The denticity of ligand L is ......... .(Integer answer)

[27 Aug 2021 Shift 1]

1‌mol of an octahedral metal complex with formula MCl3.2L on reaction with excess of AgNO3 gives 1‌mol of AgCl. The denticity of ligand L is ......... .(Integer answer)

[27 Aug 2021 Shift 1]

Q.126 Correct

Q.126 In-correct

Q.126 Unattempt

Indicate the complex/complex ion which did not show any geometrical isomerism.

[26 Aug 2021 Shift 2]

Indicate the complex/complex ion which did not show any geometrical isomerism.

[26 Aug 2021 Shift 2]

Q.127 Correct

Q.127 In-correct

Q.127 Unattempt

The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is/are.

[31 Aug 2021 Shift 1]

The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is/are.

[31 Aug 2021 Shift 1]

Q.128 Correct

Q.128 In-correct

Q.128 Unattempt

In the structure of the dichromate ion, there is a

[31 Aug 2021 Shift 1]

In the structure of the dichromate ion, there is a

[31 Aug 2021 Shift 1]

Q.129 Correct

Q.129 In-correct

Q.129 Unattempt

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a prussian blue coloured colloidal species. It is

[27 Aug 2021 Shift 1]

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a prussian blue coloured colloidal species. It is

[27 Aug 2021 Shift 1]

Q.130 Correct

Q.130 In-correct

Q.130 Unattempt

The overall stability constant of the complex ion [Cu(NH3)4]2+ is 2.1×1013. The overall dissociations constant is y×10−14. Then, y is .......... . (Nearest integer)

[26 Aug 2021 Shift 2]

The overall stability constant of the complex ion [Cu(NH3)4]2+ is 2.1×1013. The overall dissociations constant is y×10−14. Then, y is .......... . (Nearest integer)

[26 Aug 2021 Shift 2]

Q.131 Correct

Q.131 In-correct

Q.131 Unattempt

Arrange the following cobalt complexes in the order of increasing crystal field stabilisation energy (CFSE) value.
Complexes

]3+
Choose the correct option.

[26 Aug 2021 Shift 2]

Arrange the following cobalt complexes in the order of increasing crystal field stabilisation energy (CFSE) value.
Complexes

]3+
Choose the correct option.

[26 Aug 2021 Shift 2]

Q.132 Correct

Q.132 In-correct

Q.132 Unattempt

Which one of the following complexes is violet in colour?

[26 Aug 2021 Shift 1]

Which one of the following complexes is violet in colour?

[26 Aug 2021 Shift 1]

Q.133 Correct

Q.133 In-correct

Q.133 Unattempt

The potassium ferrocyanide solution gives a prussian blue colour, when added to

[1 Sep 2021 Shift 2]

The potassium ferrocyanide solution gives a prussian blue colour, when added to

The crystal field stabilisation energy (CFSE) and magnetic moment (spin - only) of an octahedral aqua complex of a metal ion (M+) are −0.8Δ0 and 3.87‌BM, respectively.
Identify (M2+).

[1 Sep 2021 Shift 2]

The crystal field stabilisation energy (CFSE) and magnetic moment (spin - only) of an octahedral aqua complex of a metal ion (M+) are −0.8Δ0 and 3.87‌BM, respectively.
Identify (M2+).

The volume (in mL ) of 0.125MAgNO3 required to quantitatively precipitate chloride ions in 0.3g of [Co(NH3)6]Cl3 is ________.
M[Co(NH3),Cl3=267.46g∕mol
MAgNO3=169.87g∕mol

[NV, Jan. 08 ,2020(I)]

The volume (in mL ) of 0.125MAgNO3 required to quantitatively precipitate chloride ions in 0.3g of [Co(NH3)6]Cl3 is ________.
M[Co(NH3),Cl3=267.46g∕mol
MAgNO3=169.87g∕mol

[NV, Jan. 08 ,2020(I)]

Q.136 Correct

Q.136 In-correct

Q.136 Unattempt

The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is:
(A) Ni(CO)4
(B) [Ni(H2O)6]Cl2
(C) Na2[Ni(CN)4]
(D) PdCl2(PPh3)2

[Jan. 08, 2020(II)]

The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is:
(A) Ni(CO)4
(B) [Ni(H2O)6]Cl2
(C) Na2[Ni(CN)4]
(D) PdCl2(PPh3)2

Complexes (ML ‌5 ) of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal geometries, respectively. The sum of the 90∘,120∘ and 180∘L−M−L angles in the two complexes is ______.

[NV, Jan. 08, 2020(II)]

Complexes (ML ‌5 ) of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal geometries, respectively. The sum of the 90∘,120∘ and 180∘L−M−L angles in the two complexes is ______.

[NV, Jan. 08, 2020(II)]

Q.138 Correct

Q.138 In-correct

Q.138 Unattempt

The theory that can completely\/properly explain the nature of bonding in [Ni(CO)4] is:

[Jan. 07,2020(I)]

The theory that can completely\/properly explain the nature of bonding in [Ni(CO)4] is:

Complex X of composition Cr(H2O)6Cln has a spin only magnetic moment of 3.83BM. It reacts with AgNO3 and shows geometrical isomerism. The IUPAC nomenclature of X is:

[Jan. 09,2020 (I)]

Complex X of composition Cr(H2O)6Cln has a spin only magnetic moment of 3.83BM. It reacts with AgNO3 and shows geometrical isomerism. The IUPAC nomenclature of X is:

The isomer(s) of [Co(NH3)4Cl2] that has/have a Cl−Co−Cl angle of 90∘, is/are:

[Jan. 09,2020 (II)]

The isomer(s) of [Co(NH3)4Cl2] that has/have a Cl−Co−Cl angle of 90∘, is/are:

The complex that can show fac - and mer-isomers is:

[Jan. 08,2020 (I)]

The complex that can show fac - and mer-isomers is:

Among (a) - (d) , the complexes that can display geometrical isomerism are:
(a) [Pt(NH3)3Cl]+
(b) [Pt(NH3)3Cl]+
(c) [Pt(NH3)2Cl(NO2)]
(d)[Pt(NH3)4ClBr]2+

[Jan. 08,2020 (II)]

Among (a) - (d) , the complexes that can display geometrical isomerism are:
(a) [Pt(NH3)3Cl]+
(b) [Pt(NH3)3Cl]+
(c) [Pt(NH3)2Cl(NO2)]
(d)[Pt(NH3)4ClBr]2+

The IUPAC name of the complex [Pt(NH3)2Cl(NH2CH3)]Cl is:

[Jan. 07,2020 (I)]

The IUPAC name of the complex [Pt(NH3)2Cl(NH2CH3)]Cl is:

The number of possible optical isomers for the complexes MA2B2 with sp3 and dsp2 hybridized metal atom, respectively, is:
Note: A and B are unidentate neutral and unidentate monoanionic ligands, respectively.

[Jan. 07,2020 (II)]

The number of possible optical isomers for the complexes MA2B2 with sp3 and dsp2 hybridized metal atom, respectively, is:
Note: A and B are unidentate neutral and unidentate monoanionic ligands, respectively.

Among the statements (A)−(D), the incorrect ones are:
(A) Octahedral Co(III) complexes with strong field ligands have very high magnetic moments.
(B) When ∆0<P, the d -electron configuration of Co(III) in an octahedral complex is t2g4eg2
(C) Wavelength of light absorbed by [Co(en)3]3+ is lower than that of [CoF6]3
(D) If the ∆0 for an octahedral complex of Co(III) is 18,000 cm−1, the ∆i for its tetrahedral complex with the same ligand will be 16,000cm−1.

[Jan. 07,2020 (II)]

Among the statements (A)−(D), the incorrect ones are:
(A) Octahedral Co(III) complexes with strong field ligands have very high magnetic moments.
(B) When ∆0<P, the d -electron configuration of Co(III) in an octahedral complex is t2g4eg2
(C) Wavelength of light absorbed by [Co(en)3]3+ is lower than that of [CoF6]3
(D) If the ∆0 for an octahedral complex of Co(III) is 18,000 cm−1, the ∆i for its tetrahedral complex with the same ligand will be 16,000cm−1.

[Pd(F)(Cl)(Br)(I)]2 has n number of geometrical isomers.
Then, the spin-only magnetic moment and crystal field stabilisation energy [CFSE] of [Fe(CN)6]n−6, respectively, are:
[Note : Ignore the pairing energy]

[Jan. 09,2020(I)]

[Pd(F)(Cl)(Br)(I)]2 has n number of geometrical isomers.
Then, the spin-only magnetic moment and crystal field stabilisation energy [CFSE] of [Fe(CN)6]n−6, respectively, are:
[Note : Ignore the pairing energy]

The correct order of the spin-only magnetic moments of the following complexes is:
(A) [Cr(H2O)6]Br2
(B) Na4[Fe(CN)6]
(C) Na3[Fe(C2O4)3](∆0>P)
(D) (Et4N)2[CoCl4]

[Jan. 09,2020(II)]

The correct order of the spin-only magnetic moments of the following complexes is:
(A) [Cr(H2O)6]Br2
(B) Na4[Fe(CN)6]
(C) Na3[Fe(C2O4)3](∆0>P)
(D) (Et4N)2[CoCl4]

The total number of coordination sites in ethylenediaminetetraacetate (EDTA+) is_____.

[NV, Sep. 05,2020 (I)]

The total number of coordination sites in ethylenediaminetetraacetate (EDTA+) is_____.

[NV, Sep. 05,2020 (I)]

Q.149 Correct

Q.149 In-correct

Q.149 Unattempt

Consider the complex ions, trans-[Co(en) 2Cl2]+(A) and cis −[Co(en)2Cl2]+(B). The correct statement regarding them is :

[Sep. 05,2020 (II)]

Consider the complex ions, trans-[Co(en) 2Cl2]+(A) and cis −[Co(en)2Cl2]+(B). The correct statement regarding them is :

The number of isomers possible for [Pt(en)(NO2)2] is

[Sep. 04, 2020 (I)]

The number of isomers possible for [Pt(en)(NO2)2] is

The complex that can show optical activity is:

[Sep. 03,2020 (I)

The complex that can show optical activity is:

ComplexA has a composition of H12O6Cl3Cr. If the complex on treatment with conc. H2SO4 loses 13.5% of its original mass, the correct molecular formula of A is:
[Given : atomic mass of Cr=52 amu and Cl=35‌amu ]

[Sep. 03,2020 (II)

ComplexA has a composition of H12O6Cl3Cr. If the complex on treatment with conc. H2SO4 loses 13.5% of its original mass, the correct molecular formula of A is:
[Given : atomic mass of Cr=52 amu and Cl=35‌amu ]

The one that is not expected to show isomerism is:

[Sep. 02,2020 (II)]

The one that is not expected to show isomerism is:

The species that has a spin-only magnetic moment of 5.9 BM, is : Td= tetrahedral )

[Sep. 06, 2020 (I)]

The species that has a spin-only magnetic moment of 5.9 BM, is : Td= tetrahedral )

For a d4 metal ion in an octahedral field, the correct electronic configuration is :

[Sep. 06, 2020 (II)]

For a d4 metal ion in an octahedral field, the correct electronic configuration is :

The values of the crystal field stabilization energies for a high spin d6 metal ion in octahedral and tetrahedral fields, respectively, are:

[Sep. 05, 2020 (I)]

The values of the crystal field stabilization energies for a high spin d6 metal ion in octahedral and tetrahedral fields, respectively, are:

Considering that ∆0>P, the magnetic moment (in BM) of [Ru(H2O)6]2+ would be ______.

[NV Sep. 05, 2020 (II)]

Considering that ∆0>P, the magnetic moment (in BM) of [Ru(H2O)6]2+ would be ______.

[NV Sep. 05, 2020 (II)]

Q.158 Correct

Q.158 In-correct

Q.158 Unattempt

The pair in which both the species have the same magnetic moment (spin only) is:

[Sep. 04, 2020 (I)]

The pair in which both the species have the same magnetic moment (spin only) is:

The Crystal Field Stabilization Energy (CFSE) of [CoF3(H2O)3](∆0<P) is :

[Sep. 04, 2020 (II)]

The Crystal Field Stabilization Energy (CFSE) of [CoF3(H2O)3](∆0<P) is :

The one that can exhibit highest paramagnetic behaviour among the following is :
gly = glycinato; bpy =2,2′ -bipyridine

[Sep. 04, 2020 (II)]

The one that can exhibit highest paramagnetic behaviour among the following is :
gly = glycinato; bpy =2,2′ -bipyridine

The electronic spectrum of [Ti(H2O)6]3+ shows a single broad peak with a maximum at 20,300cm−1. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol−1, is:
(

kJmol−1=83.7cm−1

)

[Sep. 03, 2020 (I)]

The electronic spectrum of [Ti(H2O)6]3+ shows a single broad peak with a maximum at 20,300cm−1. The crystal field stabilization energy (CFSE) of the complex ion, in kJ mol−1, is:
(

The d -electron configuration of [Ru(en)3]Cl2 and [Fe(H2O)6]Cl2, respectively are:

[Sep. 03, 2020 (II)]

The d -electron configuration of [Ru(en)3]Cl2 and [Fe(H2O)6]Cl2, respectively are:

Consider that a d6 metal ion (M2+) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90BM. The geometry and the crystal field stabilization energy of the complex is:

[Sep. 02, 2020 (I)]

Consider that a d6 metal ion (M2+) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90BM. The geometry and the crystal field stabilization energy of the complex is:

For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements:
(I) both the complexes can be high spin.
(II) Ni(II) complex can veryrarely below spin.
(III) with strong field ligands, Mn(II) complexes can be low spin.
(IV) aqueous solution of Mn(II) ions is yellow in color.
The correct statements are:

[Sep. 02, 2020 (I)]

For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements:
(I) both the complexes can be high spin.
(II) Ni(II) complex can veryrarely below spin.
(III) with strong field ligands, Mn(II) complexes can be low spin.
(IV) aqueous solution of Mn(II) ions is yellow in color.
The correct statements are:

Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of Mn+ ion are provided below; their λ‌max ‌ values are marked as A, B and C respectively. The correct match between the complexes and their λ‌max ‌ values is :

(i) [M(NCS)6](−6+a)
(ii) [MF6](−6+n)
(iii) [M(NH3)6]n+

[Sep. 02, 2020 (II)]

Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of Mn+ ion are provided below; their λ‌max ‌ values are marked as A, B and C respectively. The correct match between the complexes and their λ‌max ‌ values is :

(i) [M(NCS)6](−6+a)
(ii) [MF6](−6+n)
(iii) [M(NH3)6]n+

The coordination number of Th in K4[Th(C2O4)4(H2O)2] is: (C2O42−= oxalato )

[Jan. 11,2019(II)]

The coordination number of Th in K4[Th(C2O4)4(H2O)2] is: (C2O42−= oxalato )

The total number of isomers for a square planar complex [M(F)(Cl)(SCN)(NO2)] is:

[Jan. 10, 2019(I)]

The total number of isomers for a square planar complex [M(F)(Cl)(SCN)(NO2)] is:

A reaction of cobalt(III) chloride and ethylenediamine in a 1: 2 mole ratio generates two isomeric products A (violet coloured) and B (green coloured). A can show optical activity, but, B is optically inactive. What type of isomers does A and B represent?

[Jan. 10,2019(II)]

A reaction of cobalt(III) chloride and ethylenediamine in a 1: 2 mole ratio generates two isomeric products A (violet coloured) and B (green coloured). A can show optical activity, but, B is optically inactive. What type of isomers does A and B represent?

The metal d -orbitals that are directly facing the ligands in K3[Co(CN)6] are :

[Jan.12, 2019(I)]

The metal d -orbitals that are directly facing the ligands in K3[Co(CN)6] are :

The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9BM. The suitable ligand for this complex is:

[Jan.12, 2019(I)]

The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9BM. The suitable ligand for this complex is:

Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II) :

[Jan.11, 2019(I)]

Match the metals (column I) with the coordination compound(s)/enzyme(s) (column II) :

The difference in the number of unpaired electrons of a metal ion in its high-spin and low-spin octahedral complexes is two. The metal ion is:

[Jan.10, 2019(II)]

The difference in the number of unpaired electrons of a metal ion in its high-spin and low-spin octahedral complexes is two. The metal ion is:

Two complexes [Cr(H2O)6]Cl3 (A) and [Cr(NH3)6]Cl3(B) are violet and yellow coloured, respectively. The incorrect statement regarding them is:

[Jan.9, 2019(I)]

Two complexes [Cr(H2O)6]Cl3 (A) and [Cr(NH3)6]Cl3(B) are violet and yellow coloured, respectively. The incorrect statement regarding them is:

The complex that has highest crystal field splitting energy (∆) is:

[Jan.9, 2019(II)]

The complex that has highest crystal field splitting energy (∆) is:

Homoleptic octahedral complexes of a metal ion M3+1 with three monodentate ligands L1,L2 and L3 absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is:

[Jan.9, 2019(II)]

Homoleptic octahedral complexes of a metal ion M3+1 with three monodentate ligands L1,L2 and L3 absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is:

Mn2(CO)10 is an organometallic compound due to the presence of :

[Jan. 12,2019(I)]

Mn2(CO)10 is an organometallic compound due to the presence of :

The number of bridging CO ligand(s) and Co-Co bond(s) in Co2(CO)8, respectively are:

[Jan. 11,2019(I)]

The number of bridging CO ligand(s) and Co-Co bond(s) in Co2(CO)8, respectively are:

Wilkinson catalyst is:

[Jan. 10,2019(I)]

Wilkinson catalyst is:

The coordination numbers of Co and Al in [Co(Cl)(en)2]Cl and K3[Al(C2O4)3], respectively, are:
(en= ethane- 1,2 -diamine )

[April 12,2019 (II)]

The coordination numbers of Co and Al in [Co(Cl)(en)2]Cl and K3[Al(C2O4)3], respectively, are:
(en= ethane- 1,2 -diamine )

The species that ean have a trans-isomer is:
(en= ethane −1,2− diamine, Ox= oxalate )

[April 10,2019 (I)]

The species that ean have a trans-isomer is:
(en= ethane −1,2− diamine, Ox= oxalate )

The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are:

[April 9,2019 (II)]

The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are:

The one that will show optical activity is:
(en= ethane 1,2 -diamine)

[April 9,2019 (I)]

The one that will show optical activity is:
(en= ethane 1,2 -diamine)

The following ligand is:

[April 8,2019 (I)]

The following ligand is:

The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is:

[April 12, 2019 (I)]

The complex ion that will lose its crystal field stabilization energy upon oxidation of its metal to +3 state is:

Complete removal of both the axial ligands (along the zaxis) from an octahedral complex leads to which of the following splitting patterns? (relative orbital energies not on scale)

[April 12, 2019 (I)]

Complete removal of both the axial ligands (along the zaxis) from an octahedral complex leads to which of the following splitting patterns? (relative orbital energies not on scale)

Three complexes, [CoCl(NH3)5]2+(I),[Co(NH3)5H2O]3+(II) and [Co(NH3)6]3+ (III) absorb light in the visible region. The correct order of the wavelength of light absorbed by them is :

[April 10, 2019 (I)]

Three complexes, [CoCl(NH3)5]2+(I),[Co(NH3)5H2O]3+(II) and [Co(NH3)6]3+ (III) absorb light in the visible region. The correct order of the wavelength of light absorbed by them is :

The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4], respectively are:

[April 10, 2019 (II)]

The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4], respectively are:

[April 10, 2019 (II)]

Q.188 Correct

Q.188 In-correct

Q.188 Unattempt

The degenerate orbitals of [Cr(H2O)6]3+ are:

[April 9, 2019 (I)]

The degenerate orbitals of [Cr(H2O)6]3+ are:

The correct statements among I to III are:
(I) Valence bond theory cannot explain the color exhibited by transition metal complexes.
(II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.
(III) Valence bond theory cannot distinguish ligands as week and strong field ones.

[April 9, 2019 (I)]

The correct statements among I to III are:
(I) Valence bond theory cannot explain the color exhibited by transition metal complexes.
(II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes.
(III) Valence bond theory cannot distinguish ligands as week and strong field ones.

The correct order of the spin-only magnetic moment of metal ions in the following low-spin complexes, [V(CN)6]4,[Fe(CN)6]4,[Ru(NH3)6]3+, and [Cr(NH3)6]2+, is

[April 8, 2019 (I)]

The correct order of the spin-only magnetic moment of metal ions in the following low-spin complexes, [V(CN)6]4,[Fe(CN)6]4,[Ru(NH3)6]3+, and [Cr(NH3)6]2+, is

The calculated spin-only magnetic moments (BM) of the anionic and cationic species of [Fe(H2O)6]2 and [Fe(CN)6], respectively, are:

[April 8, 2019 (II)]

The calculated spin-only magnetic moments (BM) of the anionic and cationic species of [Fe(H2O)6]2 and [Fe(CN)6], respectively, are:

The compound used in the treatment of lead poisoning is:

[April 12, 2019 (II)]

The compound used in the treatment of lead poisoning is:

[April 12, 2019 (II)]

Q.193 Correct

Q.193 In-correct

Q.193 Unattempt

The compound that inhibits the growth of tumors is :

[April 8, 2019 (II)]

The compound that inhibits the growth of tumors is :

Consider the following reaction and statements: [Co(NH3)4Br2]++Br−→[Co(NH3)3Br3]+NH3
(I) Two isomers are produced if the reactant complex ion is a cis-isomer.
(II) Two isomers are produced if the reactant complex ion is a trans -isomer
(III) Only one isomer is produced if the reactant complex ion is a trans-isomer
(IV) Only one isomer is produced if the reactant complex ion is a cis-isomer.
The correct statements are:

[2018]

Consider the following reaction and statements: [Co(NH3)4Br2]++Br−→[Co(NH3)3Br3]+NH3
(I) Two isomers are produced if the reactant complex ion is a cis-isomer.
(II) Two isomers are produced if the reactant complex ion is a trans -isomer
(III) Only one isomer is produced if the reactant complex ion is a trans-isomer
(IV) Only one isomer is produced if the reactant complex ion is a cis-isomer.
The correct statements are:

Which of the following complexes will show geometrical isomerism?

[Online April 16, 2018]

Which of the following complexes will show geometrical isomerism?

[Online April 16, 2018]

Q.196 Correct

Q.196 In-correct

Q.196 Unattempt

The total number of possible isomers for square-planar [Pt(Cl)(NO2)(NO3)(SCN)]2− is:

[Online April 15, 2018(II)]

The total number of possible isomers for square-planar [Pt(Cl)(NO2)(NO3)(SCN)]2− is:

[Online April 15, 2018(II)]

Q.197 Correct

Q.197 In-correct

Q.197 Unattempt

In Wilkinson's catalyst, the hybridisation of central metal ion and its shape are respectively:

[Online April 16, 2018]

In Wilkinson's catalyst, the hybridisation of central metal ion and its shape are respectively:

[Online April 16, 2018]

Q.198 Correct

Q.198 In-correct

Q.198 Unattempt

The correct combination is:

[Online April 15, 2018(I)]

The correct combination is:

[Online April 15, 2018(I)]

Q.199 Correct

Q.199 In-correct

Q.199 Unattempt

The correct order of spin-only magnetic moments among the following is:
(Atomic number: Mn=25,Co=27, Ni=28,Zn=30)‌‌

[Online April 15, 2018(II)]

The correct order of spin-only magnetic moments among the following is:
(Atomic number: Mn=25,Co=27, Ni=28,Zn=30)‌‌

[Online April 15, 2018(II)]

Q.200 Correct

Q.200 In-correct

Q.200 Unattempt

On treatment of 100mL of 0.1M solution of CoCl3.6H2O with excess AgNO3;1.2×1022 ions are precipitated. The complex is:

[2017]

On treatment of 100mL of 0.1M solution of CoCl3.6H2O with excess AgNO3;1.2×1022 ions are precipitated. The complex is:

The pair of compounds having metals in their highest oxidation state is :

[Online April 8, 2017]

The pair of compounds having metals in their highest oxidation state is :

[Online April 8, 2017]

[Online April 9,2017]

[Co2(CO)8] displays:

[Online April 9,2017]

Q.203 Correct

Q.203 In-correct

Q.203 Unattempt

Which one of the following complexes shows optical isomerism?

[2016]

Which one of the following complexes shows optical isomerism?

Which one of the following complexes will consume more equivalents of aqueous solution of AgNO3 ?

[Online April 9,2016]

Which one of the following complexes will consume more equivalents of aqueous solution of AgNO3 ?

[Online April 9,2016]

Q.205 Correct

Q.205 In-correct

Q.205 Unattempt

Which of the following is an example of homoleptic complex?

[Online April 10, 2016]

Which of the following is an example of homoleptic complex?

[Online April 10, 2016]

Q.206 Correct

Q.206 In-correct

Q.206 Unattempt

The pair having the same magnetic moment is:
[ At. No.: Cr=24,Mn=25,Fe=26,Co=27]

[2016]

The pair having the same magnetic moment is:
[ At. No.: Cr=24,Mn=25,Fe=26,Co=27]

Identify the correct trend given below:
(Atomic‌No.=Ti:22,Cr:24‌ and ‌Mo:42)

[Online April 9, 2016]

Identify the correct trend given below:
(Atomic‌No.=Ti:22,Cr:24‌ and ‌Mo:42)

[Online April 9, 2016]

Q.208 Correct

Q.208 In-correct

Q.208 Unattempt

The number of geometric isomers that can exist for square planar complex [Pt(Cl)(py)(NH3)(NH2OH)]+ is (py= pyridine ):

[2015]

The number of geometric isomers that can exist for square planar complex [Pt(Cl)(py)(NH3)(NH2OH)]+ is (py= pyridine ):

The correct statement on the isomerism associated with the following complex ions,
(A) [Ni(H2O)5NH3]2+,
(B) [Ni(H2O)4(NH3)2]2+
(C) [Ni(H2O)3(NH3)3]2+ is :

[Online April 10,2015]

The correct statement on the isomerism associated with the following complex ions,
(A) [Ni(H2O)5NH3]2+,
(B) [Ni(H2O)4(NH3)2]2+
(C) [Ni(H2O)3(NH3)3]2+ is :

[Online April 10,2015]

Q.210 Correct

Q.210 In-correct

Q.210 Unattempt

Which of the following compounds is not colored yellow?

[2015]

Which of the following compounds is not colored yellow?

The color of KMnO4 is due to :

[2015]

The color of KMnO4 is due to :

Which of the following complex ions has electrons that are symmetrically filled in both t2g and eg orbitals?

[Online April 11, 2015]

Which of the following complex ions has electrons that are symmetrically filled in both t2g and eg orbitals?

[Online April 11, 2015]

Q.213 Correct

Q.213 In-correct

Q.213 Unattempt

Which molecule/ion among the following cannot act as a ligand in complex compounds?

[Online April 10,2015]

Which molecule/ion among the following cannot act as a ligand in complex compounds?

[Online April 10,2015]

Q.214 Correct

Q.214 In-correct

Q.214 Unattempt

Which of the following name formula combinations is not correct?

[Online April 11,2014]

Which of the following name formula combinations is not correct?

[Online April 11,2014]

Q.215 Correct

Q.215 In-correct

Q.215 Unattempt

An octahedral complex with molecular composition M.5 NH3⋅Cl.SO4 has two isomers, A and B. The solution of A gives a white precipitate with AgNO3 solution and the solution of B gives white precipitate with BaCl2 solution. The type of isomerism exhibited by the complex is:

[Online April 19,2014]

An octahedral complex with molecular composition M.5 NH3⋅Cl.SO4 has two isomers, A and B. The solution of A gives a white precipitate with AgNO3 solution and the solution of B gives white precipitate with BaCl2 solution. The type of isomerism exhibited by the complex is:

[Online April 19,2014]

Q.216 Correct

Q.216 In-correct

Q.216 Unattempt

The octahedral complex of a metal ion M3+ with four monodentate ligands L1,L2,L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:

[2014]

The octahedral complex of a metal ion M3+ with four monodentate ligands L1,L2,L3 and L4 absorb wavelengths in the region of red, green, yellow and blue, respectively. The increasing order of ligand strength of the four ligands is:

An octahedral complex of Co3+ is diamagnetic. The hybridisation involved in the formation of the complex is:

[Online April 9, 2014]

An octahedral complex of Co3+ is diamagnetic. The hybridisation involved in the formation of the complex is:

[Online April 9, 2014]

Q.218 Correct

Q.218 In-correct

Q.218 Unattempt

The correct statement about the magnetic properties of [Fe(CN)6]3− and [FeF6]3− is (Z=26):

[Online April 9, 2014]

The correct statement about the magnetic properties of [Fe(CN)6]3− and [FeF6]3− is (Z=26):

[Online April 9, 2014]

Q.219 Correct

Q.219 In-correct

Q.219 Unattempt

Consider the coordination compound, [Co(NH3)6]Cl3. In the formation of this complex, the species which acts as the Lewis acid is:

[Online April 11, 2014]

Consider the coordination compound, [Co(NH3)6]Cl3. In the formation of this complex, the species which acts as the Lewis acid is:

[Online April 11, 2014]

Q.220 Correct

Q.220 In-correct

Q.220 Unattempt

Among the following species the one which causes the highest CFSE, ∆o as a ligand is:

[Online April 12, 2014]

Among the following species the one which causes the highest CFSE, ∆o as a ligand is:

[Online April 12, 2014]

Q.221 Correct

Q.221 In-correct

Q.221 Unattempt

Which one of the following complexes will most likely absorb visible light?
(At nos. Sc=21,Ti=22,V=23,Zn=30)

[Online April 12, 2014]

Which one of the following complexes will most likely absorb visible light?
(At nos. Sc=21,Ti=22,V=23,Zn=30)

[Online April 12, 2014]

Q.222 Correct

Q.222 In-correct

Q.222 Unattempt

Nickel (Z=28) combines with a uninegative monodentate ligand to form a diamagnetic complex [NiL4]2. The hybridisation involved and the number of unpaired electrons present in the complex are respectively:

[Online April 19, 2014]

Nickel (Z=28) combines with a uninegative monodentate ligand to form a diamagnetic complex [NiL4]2. The hybridisation involved and the number of unpaired electrons present in the complex are respectively:

[Online April 19, 2014]

Q.223 Correct

Q.223 In-correct

Q.223 Unattempt

Which of the following complex species is not expected to exhibit optical isomerism?

[2013]

Which of the following complex species is not expected to exhibit optical isomerism?

Type of isomerism which exists between [Pd(C6H5)2(SCN)2] and [Pd(C6H5)2(NCS)2] is:

[Online April 9,2013]

Type of isomerism which exists between [Pd(C6H5)2(SCN)2] and [Pd(C6H5)2(NCS)2] is:

[Online April 9,2013]

Q.225 Correct

Q.225 In-correct

Q.225 Unattempt

Which of the following is diamagnetic?

[Online April 22, 2013]

Which of the following is diamagnetic?

[Online April 22, 2013]

Q.226 Correct

Q.226 In-correct

Q.226 Unattempt

The magnetic moment of the complex anion [Cr(NO)(NH3) (CN)4]2− is:

[Online April 23, 2013]

The magnetic moment of the complex anion [Cr(NO)(NH3) (CN)4]2− is:

[Online April 23, 2013]

Q.227 Correct

Q.227 In-correct

Q.227 Unattempt

In which of the following octahedral complex species the magnitude of ∆0 will be maximum?

[Online April 25, 2013]

In which of the following octahedral complex species the magnitude of ∆0 will be maximum?

[Online April 25, 2013]

Q.228 Correct

Q.228 In-correct

Q.228 Unattempt

The structure of which of the following chloro species can be explained on the basis of dsp2 hybridisation?

[Online April 25, 2013]

The structure of which of the following chloro species can be explained on the basis of dsp2 hybridisation?

[Online April 25, 2013]

Q.229 Correct

Q.229 In-correct

Q.229 Unattempt

Which among the following will be named as dibromido bis (ethylenediamine) chromium (III) bromide?

[2012]

Which among the following will be named as dibromido bis (ethylenediamine) chromium (III) bromide?

Which of the following complex ions will exhibit optical isomerism? (en =1,2 -diamine ethane).

[Online May 12,2012]

Which of the following complex ions will exhibit optical isomerism? (en =1,2 -diamine ethane).

The complex ion [Pt(NO2)(Py)(NH3)(NH2OH)]+ will give

[Online May 26,2012]

The complex ion [Pt(NO2)(Py)(NH3)(NH2OH)]+ will give

The d -electron configurations of Cr2+,Mn2+,Fe2+ and Co2+ are d4,d5,d6 and d7 respectively. Which one of the following will exhibit the lowest paramagnetic behaviour?
(Atomic no. Cr=24,Mn=25,Fe=26,Co=27)

[Online May 7,2012]

The d -electron configurations of Cr2+,Mn2+,Fe2+ and Co2+ are d4,d5,d6 and d7 respectively. Which one of the following will exhibit the lowest paramagnetic behaviour?
(Atomic no. Cr=24,Mn=25,Fe=26,Co=27)

The correct order of ligands in the spectrochemical series is

[Online May 19,2012]

The correct order of ligands in the spectrochemical series is

Which of the following paramagnetic ions would exhibit a magnetic moment (spin only) of the order of 5 BM?
(At. Nos. Mn=25,Cr=24,V=23,Ti=22 )

[Online May 19,2012]

Which of the following paramagnetic ions would exhibit a magnetic moment (spin only) of the order of 5 BM?
(At. Nos. Mn=25,Cr=24,V=23,Ti=22 )

Square-planar geometry is shown by

[Online May 19,2012]

Square-planar geometry is shown by

Which one of the following complex ions has geometrical isomers?

[2011]

Which one of the following complex ions has geometrical isomers?

A solution containing 2.675g of CoCl3.6NH3 (molar mass =267.5gmol−1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78g of AgCl (molar mass =143.5g mol−1 ). The formula of the complex is
(At. mass of Ag=108u )

[2010]

A solution containing 2.675g of CoCl3.6NH3 (molar mass =267.5gmol−1) is passed through a cation exchanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78g of AgCl (molar mass =143.5g mol−1 ). The formula of the complex is
(At. mass of Ag=108u )

Which one of the following has an optical isomer?

[2010]

Which one of the following has an optical isomer?

Which of the following shows optical isomerism

[2009]

Which of the following shows optical isomerism

Which of the following pairs represent linkage isomers?

[2009]

Which of the following pairs represent linkage isomers?

The coordination number and the oxidation state of the element ' E ' in the complex [E(en)2(C2O4)]NO2( where (en) is ethylene diamine) are, respectively,

[2008]

The coordination number and the oxidation state of the element ' E ' in the complex [E(en)2(C2O4)]NO2( where (en) is ethylene diamine) are, respectively,

In which of the following complexes of the Co(at. no. 27 ), will the magnitude of ∆0 be the highest?

[2008]

In which of the following complexes of the Co(at. no. 27 ), will the magnitude of ∆0 be the highest?

Which of the following has a square planar geometry?
(At. nos: Fe=26,Co=27,Ni=28,Pt=78)

[2007]

Which of the following has a square planar geometry?
(At. nos: Fe=26,Co=27,Ni=28,Pt=78)

The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is :

[2006]

The IUPAC name for the complex [Co(NO2)(NH3)5]Cl2 is :

Nickel (Z=28) combines with a uninegative monodentate ligand X− to form a paramagnetic complex [NiX4]2−. The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively:

[2006]

Nickel (Z=28) combines with a uninegative monodentate ligand X− to form a paramagnetic complex [NiX4]2−. The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively:

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?

[2006]

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion?

In Fe(CO)5, the Fe−C bond possesses

[2006]

In Fe(CO)5, the Fe−C bond possesses

The oxidation state Cr in [Cr(NH3)4Cl2]+ is

[2005]

The oxidation state Cr in [Cr(NH3)4Cl2]+ is

The IUPAC name of the coordination compound K3[Fe(CN)6] is

[2005]

The IUPAC name of the coordination compound K3[Fe(CN)6] is

Which of the following compounds shows optical isomerism?

[2005]

Which of the following compounds shows optical isomerism?

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour?
(At. Nos: Cr=24,Mn=25,Fe=26,Co=27)

[2005]

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour?
(At. Nos: Cr=24,Mn=25,Fe=26,Co=27)

The coordination number of a central metal atom in a complex is determined by

[2004]

The coordination number of a central metal atom in a complex is determined by

Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?

[2004]

Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?

Which one of the following has largest number of isomers?

[2004]

Which one of the following has largest number of isomers?

Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by CN ion towards metal species is

[2004]

Among the properties (a) reducing (b) oxidising (c) complexing, the set of properties shown by CN ion towards metal species is

Which one of the following complexes is an outer orbital complex?
(Atomic nos. : Mn=25;Fe=26;Co=27,Ni=28 )

[2004]

Which one of the following complexes is an outer orbital complex?
(Atomic nos. : Mn=25;Fe=26;Co=27,Ni=28 )

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

[2003]

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

In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is

[2003]

In the coordination compound, K4[Ni(CN)4], the oxidation state of nickel is

The type of isomerism present in nitropentammine chromium (III) chloride is

[2002]

The type of isomerism present in nitropentammine chromium (III) chloride is

A square planar complex is formed by hybridisation of which atomic orbitals?

[2002]

A square planar complex is formed by hybridisation of which atomic orbitals?

CH3−Mg−Br is an organo metallic compound due to

[2002]

CH3−Mg−Br is an organo metallic compound due to

[2002]