Co-ordination Compounds: JEE Mains Previous Year Questions (2021-2024) | Chemistry for JEE Main & Advanced PDF Download

 Page 1


 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Given below are two statements: 
Statement (I): A solution of  Ni H
2
O 
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) Both Statement I and Statement II are incorrect 
(2) Both Statement I and Statement II are correct 
(3) Statement I is incorrect but Statement II is correct 
(4) Statement I is correct but Statement II is incorrect 
 
Q2 - 2024 (01 Feb Shift 1) 
Which of the following complex is homoleptic? 
(1)  Ni(CN)
4
 
2-
 
(2)  Ni NH
3
 
2
Cl
2
  
(3)  Fe NH
3
 
4
Cl
2
 
+
 
(4)  Co NH
3
 
4
Cl
2
 
+
 
 
Q3 - 2024 (01 Feb Shift 2) 
 Co NH
3
 
6
 
3+
and CoF
6
 
3-
 are respectively known as: 
(1) Spin free Complex, Spin paired Complex 
(2) Spin paired Complex, Spin free Complex 
(3) Outer orbital Complex, Inner orbital Complex 
(4) Inner orbital Complex, Spin paired Complex 
 
Q4 - 2024 (01 Feb Shift 2) 
Given below are two statements: 
Statement (I): Dimethyl glyoxime forms a sixmembered covalent chelate when treated 
with NiCl
2
 solution in presence of NH
4
OH. 
Page 2


 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Given below are two statements: 
Statement (I): A solution of  Ni H
2
O 
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) Both Statement I and Statement II are incorrect 
(2) Both Statement I and Statement II are correct 
(3) Statement I is incorrect but Statement II is correct 
(4) Statement I is correct but Statement II is incorrect 
 
Q2 - 2024 (01 Feb Shift 1) 
Which of the following complex is homoleptic? 
(1)  Ni(CN)
4
 
2-
 
(2)  Ni NH
3
 
2
Cl
2
  
(3)  Fe NH
3
 
4
Cl
2
 
+
 
(4)  Co NH
3
 
4
Cl
2
 
+
 
 
Q3 - 2024 (01 Feb Shift 2) 
 Co NH
3
 
6
 
3+
and CoF
6
 
3-
 are respectively known as: 
(1) Spin free Complex, Spin paired Complex 
(2) Spin paired Complex, Spin free Complex 
(3) Outer orbital Complex, Inner orbital Complex 
(4) Inner orbital Complex, Spin paired Complex 
 
Q4 - 2024 (01 Feb Shift 2) 
Given below are two statements: 
Statement (I): Dimethyl glyoxime forms a sixmembered covalent chelate when treated 
with NiCl
2
 solution in presence of NH
4
OH. 
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) Statement I is false but Statement II is true 
(2) Both Statement I and Statement II are true 
(3) Both Statement I and Statement II are false 
(4) Statement I is true but Statement II is false 
 
Q5 - 2024 (27 Jan Shift 1) 
Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. 
The product of lead formed is a : 
(1) Tetraanionic complex with coordination number six 
(2) Neutral complex with coordination number four 
(3) Dianionic complex with coordination number six 
(4) Dianionic complex with coordination number four 
 
Q6 - 2024 (27 Jan Shift 2) 
Identify from the following species in which d
2
sp
3
 hybridization is shown by central 
atom: 
(1)  Co NH
3
 
6
 
3+
 
(2) BrF
5
 
(3)  Pt(Cl)
4
 
2-
 
(4) SF
6
 
 
Q7 - 2024 (27 Jan Shift 2) 
Identity the incorrect pair from the following: 
(1) Photography - AgBr 
(2) Polythene preparation - TiCl
4
, Al CH
3
 
3
 
(3) Haber process - Iron 
(4) Wacker process -PtCl2 
 
Q8 - 2024 (27 Jan Shift 2) 
The Spin only magnetic moment value of square planar complex 
 Pt NH
3
 
2
Cl NH
2
CH
3
  Cl is _____ 
B.M. (Nearest integer) 
(Given atomic number for Pt = 78) 
 
Page 3


 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Given below are two statements: 
Statement (I): A solution of  Ni H
2
O 
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) Both Statement I and Statement II are incorrect 
(2) Both Statement I and Statement II are correct 
(3) Statement I is incorrect but Statement II is correct 
(4) Statement I is correct but Statement II is incorrect 
 
Q2 - 2024 (01 Feb Shift 1) 
Which of the following complex is homoleptic? 
(1)  Ni(CN)
4
 
2-
 
(2)  Ni NH
3
 
2
Cl
2
  
(3)  Fe NH
3
 
4
Cl
2
 
+
 
(4)  Co NH
3
 
4
Cl
2
 
+
 
 
Q3 - 2024 (01 Feb Shift 2) 
 Co NH
3
 
6
 
3+
and CoF
6
 
3-
 are respectively known as: 
(1) Spin free Complex, Spin paired Complex 
(2) Spin paired Complex, Spin free Complex 
(3) Outer orbital Complex, Inner orbital Complex 
(4) Inner orbital Complex, Spin paired Complex 
 
Q4 - 2024 (01 Feb Shift 2) 
Given below are two statements: 
Statement (I): Dimethyl glyoxime forms a sixmembered covalent chelate when treated 
with NiCl
2
 solution in presence of NH
4
OH. 
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) Statement I is false but Statement II is true 
(2) Both Statement I and Statement II are true 
(3) Both Statement I and Statement II are false 
(4) Statement I is true but Statement II is false 
 
Q5 - 2024 (27 Jan Shift 1) 
Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. 
The product of lead formed is a : 
(1) Tetraanionic complex with coordination number six 
(2) Neutral complex with coordination number four 
(3) Dianionic complex with coordination number six 
(4) Dianionic complex with coordination number four 
 
Q6 - 2024 (27 Jan Shift 2) 
Identify from the following species in which d
2
sp
3
 hybridization is shown by central 
atom: 
(1)  Co NH
3
 
6
 
3+
 
(2) BrF
5
 
(3)  Pt(Cl)
4
 
2-
 
(4) SF
6
 
 
Q7 - 2024 (27 Jan Shift 2) 
Identity the incorrect pair from the following: 
(1) Photography - AgBr 
(2) Polythene preparation - TiCl
4
, Al CH
3
 
3
 
(3) Haber process - Iron 
(4) Wacker process -PtCl2 
 
Q8 - 2024 (27 Jan Shift 2) 
The Spin only magnetic moment value of square planar complex 
 Pt NH
3
 
2
Cl NH
2
CH
3
  Cl is _____ 
B.M. (Nearest integer) 
(Given atomic number for Pt = 78) 
 
Q9 - 2024 (29 Jan Shift 1) 
In which one of the following metal carbonyls, CO forms a bridge between metal atoms? 
(1)  Co
2
(CO)
8
  
(2)  Mn
2
(CO)
10
  
(3)  Os
3
(CO)
12
  
(4)  Ru
3
(CO)
12
  
 
Q10 - 2024 (29 Jan Shift 2) 
The correct IUPAC name of K
2
MnO
4
 is 
(1) Potassium tetraoxopermanganate (VI) 
(2) Potassium tetraoxidomanganate (VI) 
(3) Dipotassiumtetraoxidomanganate (VII) 
(4) Potassium tetraoxidomanganese (VI) 
 
Q11 - 2024 (30 Jan Shift 1) 
Aluminium chloride in acidified aqueous solution forms an ion having geometry 
(1) Octahedral 
(2) Square Planar 
(3) Tetrahedral 
(4) Trigonalbipyramidal 
 
Q12 - 2024 (30 Jan Shift 1) 
Choose the correct Statements from the following: 
(A) Ethane-1 2-diamine is a chelating ligand. 
(B) Metallic aluminium is produced by electrolysis 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 Ca
2+
 and Mg
2+
 are similar with EDTA complexes. 
Choose the correct answer from the options given below: 
(1) (B), (C), (E) only 
(2) (C), (D), (E) only 
(3) (A), (B), (C) only 
(4) (A), (D), (E) only 
 
Page 4


 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Given below are two statements: 
Statement (I): A solution of  Ni H
2
O 
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) Both Statement I and Statement II are incorrect 
(2) Both Statement I and Statement II are correct 
(3) Statement I is incorrect but Statement II is correct 
(4) Statement I is correct but Statement II is incorrect 
 
Q2 - 2024 (01 Feb Shift 1) 
Which of the following complex is homoleptic? 
(1)  Ni(CN)
4
 
2-
 
(2)  Ni NH
3
 
2
Cl
2
  
(3)  Fe NH
3
 
4
Cl
2
 
+
 
(4)  Co NH
3
 
4
Cl
2
 
+
 
 
Q3 - 2024 (01 Feb Shift 2) 
 Co NH
3
 
6
 
3+
and CoF
6
 
3-
 are respectively known as: 
(1) Spin free Complex, Spin paired Complex 
(2) Spin paired Complex, Spin free Complex 
(3) Outer orbital Complex, Inner orbital Complex 
(4) Inner orbital Complex, Spin paired Complex 
 
Q4 - 2024 (01 Feb Shift 2) 
Given below are two statements: 
Statement (I): Dimethyl glyoxime forms a sixmembered covalent chelate when treated 
with NiCl
2
 solution in presence of NH
4
OH. 
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) Statement I is false but Statement II is true 
(2) Both Statement I and Statement II are true 
(3) Both Statement I and Statement II are false 
(4) Statement I is true but Statement II is false 
 
Q5 - 2024 (27 Jan Shift 1) 
Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. 
The product of lead formed is a : 
(1) Tetraanionic complex with coordination number six 
(2) Neutral complex with coordination number four 
(3) Dianionic complex with coordination number six 
(4) Dianionic complex with coordination number four 
 
Q6 - 2024 (27 Jan Shift 2) 
Identify from the following species in which d
2
sp
3
 hybridization is shown by central 
atom: 
(1)  Co NH
3
 
6
 
3+
 
(2) BrF
5
 
(3)  Pt(Cl)
4
 
2-
 
(4) SF
6
 
 
Q7 - 2024 (27 Jan Shift 2) 
Identity the incorrect pair from the following: 
(1) Photography - AgBr 
(2) Polythene preparation - TiCl
4
, Al CH
3
 
3
 
(3) Haber process - Iron 
(4) Wacker process -PtCl2 
 
Q8 - 2024 (27 Jan Shift 2) 
The Spin only magnetic moment value of square planar complex 
 Pt NH
3
 
2
Cl NH
2
CH
3
  Cl is _____ 
B.M. (Nearest integer) 
(Given atomic number for Pt = 78) 
 
Q9 - 2024 (29 Jan Shift 1) 
In which one of the following metal carbonyls, CO forms a bridge between metal atoms? 
(1)  Co
2
(CO)
8
  
(2)  Mn
2
(CO)
10
  
(3)  Os
3
(CO)
12
  
(4)  Ru
3
(CO)
12
  
 
Q10 - 2024 (29 Jan Shift 2) 
The correct IUPAC name of K
2
MnO
4
 is 
(1) Potassium tetraoxopermanganate (VI) 
(2) Potassium tetraoxidomanganate (VI) 
(3) Dipotassiumtetraoxidomanganate (VII) 
(4) Potassium tetraoxidomanganese (VI) 
 
Q11 - 2024 (30 Jan Shift 1) 
Aluminium chloride in acidified aqueous solution forms an ion having geometry 
(1) Octahedral 
(2) Square Planar 
(3) Tetrahedral 
(4) Trigonalbipyramidal 
 
Q12 - 2024 (30 Jan Shift 1) 
Choose the correct Statements from the following: 
(A) Ethane-1 2-diamine is a chelating ligand. 
(B) Metallic aluminium is produced by electrolysis 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 Ca
2+
 and Mg
2+
 are similar with EDTA complexes. 
Choose the correct answer from the options given below: 
(1) (B), (C), (E) only 
(2) (C), (D), (E) only 
(3) (A), (B), (C) only 
(4) (A), (D), (E) only 
 
Q13 - 2024 (30 Jan Shift 2) 
The molecule/ion with square pyramidal shape is: 
(1)  Ni(CN)
4
 
2-
 
(2) PCl
5
 
(3) BrF
5
 
(4) PF
5
 
 
Q14 - 2024 (30 Jan Shift 2) 
The coordination geometry around the manganese in decacarbonyl dimanganese (0) 
(1) Octahedral 
(2) Trigonalbipyramidal 
(3) Square pyramidal 
(4) Square planar 
 
Q15 - 2024 (30 Jan Shift 2) 
Number of complexes which show optical isomerism among the following is 
cis- Cr(ox)
2
Cl
2
 
3-
, Co(en)
3
 
3+
, 
cis- Pt(en)
2
Cl
2
 
2+
, cis - Co(en)
2
Cl
2
 
+
, 
trans - Pt(en)
2
Cl
2
 
2+
, trans - Cr(ox)
2
Cl
2
 
3-
 
 
Q16 - 2024 (31 Jan 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 dsp
2
. 
D. The number of possible isomer(s) of cis-  PtCl
2
(en)
2
 
2+
 is one 
Choose the correct answer from the options given below: 
(1) A, D only 
(2) A, C only 
(3) B, D only 
(4) B, C only 
 
Q17 - 2024 (31 Jan Shift 2) 
Match List I with List II 
Page 5


 
 
2024 
 
Q1 - 2024 (01 Feb Shift 1) 
Given below are two statements: 
Statement (I): A solution of  Ni H
2
O 
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) Both Statement I and Statement II are incorrect 
(2) Both Statement I and Statement II are correct 
(3) Statement I is incorrect but Statement II is correct 
(4) Statement I is correct but Statement II is incorrect 
 
Q2 - 2024 (01 Feb Shift 1) 
Which of the following complex is homoleptic? 
(1)  Ni(CN)
4
 
2-
 
(2)  Ni NH
3
 
2
Cl
2
  
(3)  Fe NH
3
 
4
Cl
2
 
+
 
(4)  Co NH
3
 
4
Cl
2
 
+
 
 
Q3 - 2024 (01 Feb Shift 2) 
 Co NH
3
 
6
 
3+
and CoF
6
 
3-
 are respectively known as: 
(1) Spin free Complex, Spin paired Complex 
(2) Spin paired Complex, Spin free Complex 
(3) Outer orbital Complex, Inner orbital Complex 
(4) Inner orbital Complex, Spin paired Complex 
 
Q4 - 2024 (01 Feb Shift 2) 
Given below are two statements: 
Statement (I): Dimethyl glyoxime forms a sixmembered covalent chelate when treated 
with NiCl
2
 solution in presence of NH
4
OH. 
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) Statement I is false but Statement II is true 
(2) Both Statement I and Statement II are true 
(3) Both Statement I and Statement II are false 
(4) Statement I is true but Statement II is false 
 
Q5 - 2024 (27 Jan Shift 1) 
Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. 
The product of lead formed is a : 
(1) Tetraanionic complex with coordination number six 
(2) Neutral complex with coordination number four 
(3) Dianionic complex with coordination number six 
(4) Dianionic complex with coordination number four 
 
Q6 - 2024 (27 Jan Shift 2) 
Identify from the following species in which d
2
sp
3
 hybridization is shown by central 
atom: 
(1)  Co NH
3
 
6
 
3+
 
(2) BrF
5
 
(3)  Pt(Cl)
4
 
2-
 
(4) SF
6
 
 
Q7 - 2024 (27 Jan Shift 2) 
Identity the incorrect pair from the following: 
(1) Photography - AgBr 
(2) Polythene preparation - TiCl
4
, Al CH
3
 
3
 
(3) Haber process - Iron 
(4) Wacker process -PtCl2 
 
Q8 - 2024 (27 Jan Shift 2) 
The Spin only magnetic moment value of square planar complex 
 Pt NH
3
 
2
Cl NH
2
CH
3
  Cl is _____ 
B.M. (Nearest integer) 
(Given atomic number for Pt = 78) 
 
Q9 - 2024 (29 Jan Shift 1) 
In which one of the following metal carbonyls, CO forms a bridge between metal atoms? 
(1)  Co
2
(CO)
8
  
(2)  Mn
2
(CO)
10
  
(3)  Os
3
(CO)
12
  
(4)  Ru
3
(CO)
12
  
 
Q10 - 2024 (29 Jan Shift 2) 
The correct IUPAC name of K
2
MnO
4
 is 
(1) Potassium tetraoxopermanganate (VI) 
(2) Potassium tetraoxidomanganate (VI) 
(3) Dipotassiumtetraoxidomanganate (VII) 
(4) Potassium tetraoxidomanganese (VI) 
 
Q11 - 2024 (30 Jan Shift 1) 
Aluminium chloride in acidified aqueous solution forms an ion having geometry 
(1) Octahedral 
(2) Square Planar 
(3) Tetrahedral 
(4) Trigonalbipyramidal 
 
Q12 - 2024 (30 Jan Shift 1) 
Choose the correct Statements from the following: 
(A) Ethane-1 2-diamine is a chelating ligand. 
(B) Metallic aluminium is produced by electrolysis 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 Ca
2+
 and Mg
2+
 are similar with EDTA complexes. 
Choose the correct answer from the options given below: 
(1) (B), (C), (E) only 
(2) (C), (D), (E) only 
(3) (A), (B), (C) only 
(4) (A), (D), (E) only 
 
Q13 - 2024 (30 Jan Shift 2) 
The molecule/ion with square pyramidal shape is: 
(1)  Ni(CN)
4
 
2-
 
(2) PCl
5
 
(3) BrF
5
 
(4) PF
5
 
 
Q14 - 2024 (30 Jan Shift 2) 
The coordination geometry around the manganese in decacarbonyl dimanganese (0) 
(1) Octahedral 
(2) Trigonalbipyramidal 
(3) Square pyramidal 
(4) Square planar 
 
Q15 - 2024 (30 Jan Shift 2) 
Number of complexes which show optical isomerism among the following is 
cis- Cr(ox)
2
Cl
2
 
3-
, Co(en)
3
 
3+
, 
cis- Pt(en)
2
Cl
2
 
2+
, cis - Co(en)
2
Cl
2
 
+
, 
trans - Pt(en)
2
Cl
2
 
2+
, trans - Cr(ox)
2
Cl
2
 
3-
 
 
Q16 - 2024 (31 Jan 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 dsp
2
. 
D. The number of possible isomer(s) of cis-  PtCl
2
(en)
2
 
2+
 is one 
Choose the correct answer from the options given below: 
(1) A, D only 
(2) A, C only 
(3) B, D only 
(4) B, C only 
 
Q17 - 2024 (31 Jan Shift 2) 
Match List I with List II 
 LIST - I  LIST - II 
 (Complex ion)  (Electronic Configuration) 
A.  Cr H
2
O 
6
 
3+
 I. t
2
2
e
g
0
 
B.  Fe H
2
O 
6
 
3+
 II. t
2
3
e
g
0
  
C.  Ni H
2
O 
6
 
2+
 III. t
2
3
e
2
 
D.  V H
2
O 
6
 
3+
 IV. t
2
6
e
2
 
 
Choose the correct answer from the options given below : 
(1) A-III, B-II, C-IV, D-I 
(2) A-IV, B-I, C-II, D-III 
(3) A-IV, B-III, C-I, D-II 
(4) A-II, B-III, C-IV, D-I 
 
Q18 - 2024 (31 Jan Shift 2) 
Select the option with correct property - 
(1)  Ni(CO)
4
  and  NiCl
4
 
2-
 both diamagnetic 
(2)  Ni(CO)
4
  and  NiCl
4
 
2-
 both paramagnetic 
(3)  NiCl
4
 
2-
diamagnetic,  Ni(CO)
4
  paramagnetic 
(4)  Ni(CO)
4
 diamagnetic,  NiCl
4
 
2-
 paramagnetic 
 
 
Answer Key 
 
Q1 (2)  
 
Q2 (1)  
 
Q3 (2) 
 
Q4 (1)  
 
Q5 (4)  
 
Q6 (1)