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Friday, 9 October

JEE Main Chemistry · Class 12

Coordination Compounds: JEE Main previous year questions

Coordination Compounds had 80 questions in the 42 JEE Main shifts Lumi analysed, about 1.6 a shift, asked in 41 of 42 shifts. It ranks 2 of 30 Chemistry chapters by questions; 13% of its questions were hard.

Questions
80
in 41 of 42 shifts
A shift, on average
1.6
of 25 Chemistry questions
Since 2024
+0.5
1.4 a shift in 2017–23, 1.9 in 2024–26
Numerical answer
25
31% of its questions

Year by year

How often it came

Questions in the analysed shifts of each year. Years differ in how many shifts Lumi analysed, so read the bars with the shift count.

Questions each year
010201’178’207’213’2210’2319’2418’2514’26

2017: 1 shifts · 2020: 4 shifts · 2021: 4 shifts · 2022: 4 shifts · 2023: 4 shifts · 2024: 8 shifts · 2025: 8 shifts · 2026: 9 shifts

Difficulty by year
  • 20171
  • 20208
  • 20217
  • 20223
  • 202310
  • 202419
  • 202518
  • 202614
  • Easy
  • Medium
  • Hard

Inside the chapter

Topics and the ideas that repeat

5 topics and 25 distinct ideas; 11 ideas were asked more than once. Most questions are single correct and multi-step.

Topics, by questions

10 questions had no close topic in our taxonomy and are counted for the chapter only.

Ideas asked most
11 repeat

Study it on Lumi

Coordination Compounds: the interactive lesson

Every question

All 80 Coordination Compounds questions

Newest first. Each opens with its options and the official answer.

2026 14 questions

  1. 2 Apr 2026, Shift 1 · Q62Match List - I with List - II. List - I : Chromium (III) Complexes (en = ethylene diamine) List - II : Δ0\Delta_0 (cm−1\mathrm{cm^{-1}}) A.…MediumMatch the list
  2. 2 Apr 2026, Shift 1 · Q715.335.33 g of CrCl3⋅6H2O\mathrm{CrCl_3{\cdot}6H_2O}, which is a 1:31:3 electrolyte, is dissolved in water and is passed through a cation exchanger.…HardNumerical value
  3. 2 Apr 2026, Shift 2 · Q61Which of the following complexes will show coordination isomerism? A. [Ag(NH3)2][Ag(CN)2][Ag(NH_3)_2][Ag(CN)_2] B. [Co(NH3)6][Cr(CN)6][Co(NH_3)_6][Cr(CN)_6] C.…MediumSingle correct
  4. 4 Apr 2026, Shift 1 · Q62Match the LIST-I with LIST-II List-I (Complex ion): A. [Cr(H2O)6]2+[\mathrm{Cr(H_2O)_6}]^{2+}; B. [Co(H2O)6]2+[\mathrm{Co(H_2O)_6}]^{2+}; C.…EasyMatch the list
  5. 4 Apr 2026, Shift 2 · Q60Consider the metal complexes [Ni(en)3]2+\mathrm{[Ni(en)_3]^{2+}} (A), [NiCl4]2−\mathrm{[NiCl_4]^{2-}} (B) and [Ni(NH3)6]2+\mathrm{[Ni(NH_3)_6]^{2+}} (C). Choose the…MediumSingle correct
  6. 5 Apr 2026, Shift 1 · Q61The correct statements about metal carbonyls are A. The metal-carbon bonds in metal carbonyls possess both σ\sigma and π\pi-character.…MediumOther
  7. 5 Apr 2026, Shift 1 · Q62Given below are two statements: Statement I: Each electron in ege_g orbitals destabilizes the orbitals by +0.6 Δo+0.6\,\Delta_o and each…EasyTwo statements
  8. 5 Apr 2026, Shift 2 · Q61Identify the correct statements from the following A. [Fe(C2O4)3]3−\mathrm{[Fe(C_2O_4)_3]^{3-}} is the most stable complex among…HardOther
  9. 5 Apr 2026, Shift 2 · Q71The total number of unpaired electrons present in the d3d^3, d4d^4 (low spin) d5d^5 (high spin), d6d^6 (high spin) and d7d^7 (low spin)…EasyNumerical value
  10. 6 Apr 2026, Shift 1 · Q61Match the LIST-I with LIST-II List-I (Electronic configuration of tetrahedral metal ion) | List-II (Crystal Field Stabilization Energy…MediumMatch the list
  11. 6 Apr 2026, Shift 1 · Q62Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex? A. dxy=dxz>dx2−y2d_{xy}=d_{xz}>d_{x^2-y^2} B.…EasyOther
  12. 6 Apr 2026, Shift 2 · Q61Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds ? A.…MediumOther
  13. 6 Apr 2026, Shift 2 · Q71An excess of AgNO3\mathrm{AgNO_3} is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles…EasyNumerical value
  14. 8 Apr 2026, Shift 2 · Q71Number of paramagnetic complexes among the following is ________. [MnBr4]2−[\mathrm{MnBr_4}]^{2-}, [NiCl4]2−[\mathrm{NiCl_4}]^{2-},…MediumNumerical value

2025 18 questions

  1. 2 Apr 2025, Shift 1 · Q60Given below are two statements : Statement (I) : In octahedral complexes, when Δo<\Delta_o< P high spin complexes are formed. When…EasyTwo statements
  2. 2 Apr 2025, Shift 1 · Q74A transition metal (M) among Mn, Cr, Co and Fe has the highest standard electrode potential (M3+/M2+\mathrm{M^{3+}/M^{2+}}). It forms a metal…MediumNumerical value
  3. 2 Apr 2025, Shift 2 · Q60The d-orbital electronic configuration of the complex among [Co(en)3]3+\mathrm{[Co(en)_3]^{3+}}, [CoF6]3−\mathrm{[CoF_6]^{3-}},…MediumSingle correct
  4. 2 Apr 2025, Shift 2 · Q61The type of hybridization and the magnetic property of [MnCl6]3−\mathrm{[MnCl_6]^{3-}} are,MediumSingle correct
  5. 3 Apr 2025, Shift 1 · Q63The correct order of the complexes [Co(NH3)5(H2O)]3+\mathrm{[Co(NH_3)_5(H_2O)]^{3+}} (A), [Co(NH3)6]3+\mathrm{[Co(NH_3)_6]^{3+}} (B), [Co(CN)6]3−\mathrm{[Co(CN)_6]^{3-}}…MediumSingle correct
  6. 3 Apr 2025, Shift 1 · Q72The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is ______.…MediumNumerical value
  7. 3 Apr 2025, Shift 2 · Q62Identify the diamagnetic octahedral complex ions from below ; A. [Mn(CN)6]3−[\mathrm{Mn(CN)_6}]^{3-} B. [Co(NH3)6]3+[\mathrm{Co(NH_3)_6}]^{3+} C.…MediumOther
  8. 4 Apr 2025, Shift 2 · Q59'X' is the number of electrons in t2g\mathrm{t_{2g}} orbitals of the most stable complex ion among [Fe(NH3)6]3+\mathrm{[Fe(NH_3)_6]^{3+}},…MediumSingle correct
  9. 4 Apr 2025, Shift 2 · Q60The correct order of [FeF6]3−\mathrm{[FeF_6]^{3-}}, [CoF6]3−\mathrm{[CoF_6]^{3-}}, [Ni(CO)4]\mathrm{[Ni(CO)_4]} and [Ni(CN)4]2−\mathrm{[Ni(CN)_4]^{2-}} complex…MediumSingle correct
  10. 4 Apr 2025, Shift 2 · Q75A metal complex with a formula MCl4⋅3NH3\mathrm{MCl_4\cdot3NH_3} is involved in sp3d2\mathrm{sp^3d^2} hybridisation. It upon reaction with excess of…MediumNumerical value
  11. 7 Apr 2025, Shift 1 · Q62An octahedral complex having molecular composition Co.5NH3.Cl.SO4\mathrm{Co.5NH_3.Cl.SO_4} has two isomers A and B. The solution of A gives a white…EasySingle correct
  12. 7 Apr 2025, Shift 1 · Q73The number of paramagnetic complexes among [FeF6]3−[\mathrm{FeF_6}]^{3-}, [Fe(CN)6]3−[\mathrm{Fe(CN)_6}]^{3-}, [Mn(CN)6]3−[\mathrm{Mn(CN)_6}]^{3-},…HardNumerical value
  13. 7 Apr 2025, Shift 2 · Q62The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively :…MediumSingle correct
  14. 7 Apr 2025, Shift 2 · Q63Match List - I with List - II. List - I (Complex) | List - II (Primary valency and Secondary valency) (A) [Co(en)2Cl2]Cl\mathrm{[Co(en)_2Cl_2]Cl} |…MediumMatch the list
  15. 7 Apr 2025, Shift 2 · Q73The number of paramagnetic metal complex species among [Co(NH3)6]3+\mathrm{[Co(NH_3)_6]^{3+}}, [Co(C2O4)3]3−\mathrm{[Co(C_2O_4)_3]^{3-}},…HardNumerical value
  16. 8 Apr 2025, Shift 2 · Q55The number of species from the following that are involved in sp3d2\mathrm{sp^3d^2} hybridization is [Co(NH3)6]3+\mathrm{[Co(NH_3)_6]^{3+}},…HardSingle correct
  17. 8 Apr 2025, Shift 2 · Q59Given below are two statements: Statement I : A homoleptic octahedral complex, formed using monodentate ligands, will not show…MediumTwo statements
  18. 8 Apr 2025, Shift 2 · Q60Match the LIST-I with LIST-II LIST-I (Complex/ Species) | LIST-II (Shape & magnetic moment) A. [Ni(CO)4]\mathrm{[Ni(CO)_4]} | I. Tetrahedral, 2.8…MediumMatch the list

2024 19 questions

  1. 6 Apr 2024, Shift 2 · Q70The correct IUPAC name of [PtBr2(PMe3)2][\mathrm{PtBr_2(PMe_3)_2}] is :EasySingle correct
  2. 6 Apr 2024, Shift 2 · Q71Match List - I with List - II. List - I (Tetrahedral Complex) (A) TiCl4\mathrm{TiCl_4} (B) [FeO4]2−[\mathrm{FeO_4}]^{2-} (C)…MediumMatch the list
  3. 6 Apr 2024, Shift 2 · Q87Consider the following reactions NiS+HNO3+HCl→A+NO+S+H2O\mathrm{NiS + HNO_3 + HCl \rightarrow A + NO + S + H_2O}…HardNumerical value
  4. 8 Apr 2024, Shift 1 · Q67Given below are two statements: Statement I: N(CH3)3\mathrm{N(CH_3)_3} and P(CH3)3\mathrm{P(CH_3)_3} can act as ligands to form transition metal…MediumTwo statements
  5. 8 Apr 2024, Shift 1 · Q70An octahedral complex with the formula CoCl3⋅nNH3\mathrm{CoCl_3\cdot nNH_3} upon reaction with excess of AgNO3\mathrm{AgNO_3} solution gives 2 moles…MediumSingle correct
  6. 8 Apr 2024, Shift 1 · Q71Number of Complexes with even number of electrons in t2g\mathrm{t_{2g}} orbitals is - [Fe(H2O)6]2+[\mathrm{Fe(H_2O)_6}]^{2+},…MediumSingle correct
  7. 9 Apr 2024, Shift 1 · Q69Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : The total…MediumAssertion–reason
  8. 9 Apr 2024, Shift 1 · Q88Number of ambidentate ligands among the following is ________. NO2−,SCN−,C2O42−,NH3,CN−,SO42−,H2O\mathrm{NO_2^-, SCN^-, C_2O_4^{2-}, NH_3, CN^-, SO_4^{2-}, H_2O}.EasyNumerical value
  9. 9 Apr 2024, Shift 2 · Q70The coordination environment of Ca2+\mathrm{Ca^{2+}} ion in its complex with EDTA4−\mathrm{EDTA^{4-}} is :EasySingle correct
  10. 9 Apr 2024, Shift 2 · Q71Match List I with List II List I | List II A. K2[Ni(CN)4]\mathrm{K_2[Ni(CN)_4]} | I. sp3sp^3 B. [Ni(CO)4]\mathrm{[Ni(CO)_4]} | II. sp3d2sp^3d^2 C.…MediumMatch the list
  11. 9 Apr 2024, Shift 2 · Q87Consider the following test for a group-IV cation. M2++H2S→A\mathrm{M^{2+} + H_2S \rightarrow A} (Black precipitate) + byproduct A\mathrm{A} +…HardNumerical value
  12. 29 Jan 2024, Shift 1 · Q69In which one of the following metal carbonyls, CO forms a bridge between metal atoms?MediumSingle correct
  13. 29 Jan 2024, Shift 1 · Q70Match List I with List II LIST I (Substances) A. Ziegler catalyst B. Blood Pigment C. Wilkinson catalyst D. Vitamin B12\mathrm{B_{12}} LIST…EasyMatch the list
  14. 30 Jan 2024, Shift 2 · Q71The coordination geometry around the manganese in decacarbonyldimanganese (0) isMediumSingle correct
  15. 30 Jan 2024, Shift 2 · Q86Number of complexes which show optical isomerism among the following is ________. cis-[Cr(ox)2Cl2]3−cis\text{-}[\mathrm{Cr(ox)_2Cl_2}]^{3-},…MediumNumerical value
  16. 31 Jan 2024, Shift 1 · Q70The correct statements from following are: A. The strength of anionic ligands can be explained by crystal field theory. B. Valence bond…MediumOther
  17. 31 Jan 2024, Shift 1 · Q86The 'Spin only' Magnetic moment for [Ni(NH3)6]2+[\mathrm{Ni(NH_3)_6}]^{2+} is _________ ×10−1\times10^{-1} BM. (given = Atomic number of Ni : 28)EasyNumerical value
  18. 31 Jan 2024, Shift 2 · Q70Select the option with correct property -MediumSingle correct
  19. 31 Jan 2024, Shift 2 · Q71Match List I with List II LIST I (Complex ion) | LIST II (Electronic Configuration) A. [Cr(H2O)6]3+\mathrm{[Cr(H_2O)_6]^{3+}} | I.…MediumMatch the list

2023 10 questions

  1. 6 Apr 2023, Shift 1 · Q72Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The spin only magnetic…MediumAssertion–reason
  2. 6 Apr 2023, Shift 1 · Q88Number of ambidentate ligands in a representative metal complex [ M(en)(SCN)4_4 ] is ________. [en = ethylenediamine]EasyNumerical value
  3. 8 Apr 2023, Shift 2 · Q69Match List I with List II LIST I (Coordination Complex): A. [Cr(CN)6]3−[\mathrm{Cr(CN)_6}]^{3-}; B. [Fe(H2O)6]2+[\mathrm{Fe(H_2O)_6}]^{2+}; C.…MediumMatch the list
  4. 8 Apr 2023, Shift 2 · Q90The observed magnetic moment of the complex [Mn(NCS)6]x−[\mathrm{Mn(NCS)_6}]^{x-} is 6.06 BM. The numerical value of xx is ____________.MediumNumerical value
  5. 11 Apr 2023, Shift 1 · Q69Which of the following complex has a possibility to exist as meridional isomer?EasySingle correct
  6. 11 Apr 2023, Shift 1 · Q70The set which does not have ambidentate ligand(s) isEasySingle correct
  7. 11 Apr 2023, Shift 1 · Q76The complex that dissolves in water isHardSingle correct
  8. 11 Apr 2023, Shift 1 · Q88The ratio of spin-only magnetic moment values…EasyNumerical value
  9. 13 Apr 2023, Shift 2 · Q70Which of the following complexes will exhibit maximum attraction to an applied magnetic field?EasySingle correct
  10. 13 Apr 2023, Shift 2 · Q72The total number of stereoisomers for the complex [Cr(ox)2ClBr]3−[\mathrm{Cr}(ox)_2\mathrm{ClBr}]^{3-} (where oxox = oxalate) is:MediumSingle correct

2022 3 questions

  1. 25 Jul 2022, Shift 1 · Q86Consider the following metal complexes : [Co(NH3)6]3+[\mathrm{Co(NH_3)_6}]^{3+} [CoCl(NH3)5]2+[\mathrm{CoCl(NH_3)_5}]^{2+} [Co(CN)6]3−[\mathrm{Co(CN)_6}]^{3-}…MediumNumerical value
  2. 28 Jul 2022, Shift 1 · Q89Total number of relatively more stable isomer(s) possible for octahedral complex [Cu(en)2(SCN)2]\mathrm{[Cu(en)_2(SCN)_2]} will be __________.HardNumerical value
  3. 24 Jun 2022, Shift 1 · Q87In the cobalt-carbonyl complex : [Co2(CO)8]\mathrm{[Co_2(CO)_8]}, number of Co-Co bonds is "X" and terminal CO ligands is "Y". X + Y = ______.MediumNumerical value

2021 7 questions

  1. 3 Aug 2021, Shift 2 · Q40The oxidation states of Fe in [Fe(NCS)(NH3)5]SO4\mathrm{[Fe(NCS)(NH_3)_5]SO_4}, Na3[Fe(S2O3)3]\mathrm{Na_3[Fe(S_2O_3)_3]} and [Fe(CO)5]\mathrm{[Fe(CO)_5]} respectively areEasySingle correct
  2. 25 Jul 2021, Shift 1 · Q39Which one of the following species responds to an external magnetic field ?EasySingle correct
  3. 25 Jul 2021, Shift 1 · Q60Three moles of AgCl get precipitated when one mole of an octahedral co-ordination compound with empirical formula…MediumNumerical value
  4. 16 Mar 2021, Shift 2 · Q59[Ti(H2O)6]3+\mathrm{[Ti(H_2O)_6]^{3+}} absorbs light of wavelength 498 nm during a d-d transition. The octahedral splitting energy for the above…EasyNumerical value
  5. 18 Mar 2021, Shift 1 · Q39Match List - I with List - II : List - I (a) Chlorophyll (b) Vitamin - B12\mathrm{B_{12}} (c) Anticancer drug (d) Grubbs catalyst List - II…EasyMatch the list
  6. 18 Mar 2021, Shift 1 · Q40The correct structures of trans-[NiBr2(PPh3)2]\mathrm{[NiBr_2(PPh_3)_2]} and meridional-[Co(NH3)3(NO2)3]\mathrm{[Co(NH_3)_3(NO_2)_3]}, respectively, are :MediumDiagram basedHas a figure
  7. 18 Mar 2021, Shift 1 · Q58The total number of unpaired electrons present in the complex K3[Cr(oxalate)3]\mathrm{K_3[Cr(oxalate)_3]} is __________.EasyNumerical value

2020 8 questions

  1. 8 Jan 2020, Shift 1 · Q37The complex that can show facfac- and mermer- isomers is :EasySingle correct
  2. 8 Jan 2020, Shift 1 · Q49The volume (in mL) of 0.125 M AgNO3\mathrm{AgNO_3} required to quantitatively precipitate chloride ions in 0.3 g of…MediumNumerical value
  3. 9 Jan 2020, Shift 2 · Q36The isomer(s) of [Co(NH3)4Cl2]\mathrm{[Co(NH_3)_4Cl_2]} that has/have a Cl-Co-Cl angle of 90∘90^\circ, is/are :EasySingle correct
  4. 9 Jan 2020, Shift 2 · Q37The correct order of the spin-only magnetic moments of the following complexes is : (I) [Cr(H2O)6]Br2\mathrm{[Cr(H_2O)_6]Br_2} (II)…MediumOther
  5. 2 Sep 2020, Shift 1 · Q36For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements : (I) both the complexes can be high spin. (II)…MediumOther
  6. 2 Sep 2020, Shift 1 · Q37Consider that a d6d^{6} metal ion (M2+\mathrm{M^{2+}}) forms a complex with aqua ligands, and the spin only magnetic moment of the complex…HardSingle correct
  7. 2 Sep 2020, Shift 1 · Q49The oxidation states of iron atoms in compounds (A), (B) and (C), respectively, are xx, yy and zz. The sum of xx, yy and zz is…MediumNumerical value
  8. 6 Sep 2020, Shift 2 · Q39For a d4\mathrm{d^4} metal ion in an octahedral field, the correct electronic configuration is :EasySingle correct

2017 1 questions

  1. 2 Apr 2017 (offline) · Q50On treatment of 100 mL of 0.1 M solution of CoCl3.6H2O\mathrm{CoCl_3.6H_2O} with excess AgNO3\mathrm{AgNO_3}; 1.2×10221.2\times10^{22} ions are…MediumSingle correct

Pattern: Asked most years.