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Coordination Compounds JEE Main PYQs, 2020 to 2025

Coordination Compounds has 120 questions in JEE Main papers from 2020 to 2025, about 20 per year across all shifts. The most asked topic is Crystal Field Theory (57 questions), followed by Ligands and Coordination Number (16) and Isomerism in Coordination Compounds (14).

Updated

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120Total PYQs
6Years covered
7Topics
2025 Apr S2Latest paper

Coordination Compounds questions per year

YearQuestions
202520
202421
202333
202221
202112
202013

Topic-wise weightage

TopicQuestionsShare of chapterLast asked
Crystal Field Theory5747%2025
Ligands and Coordination Number1613%2025
Isomerism in Coordination Compounds1412%2025
Werner's Theory and Terminology1412%2025
Valence Bond Theory87%2025
Stability of Complexes65%2023
IUPAC Nomenclature54%2024

Sample questions from recent papers

JEE Main 2025 · 8 Apr · Shift 2 · Valence Bond Theory

The number of species from the following that are involved in sp3d2 hybridization is :

[Co(NH3)6]3+, SF6, [CrF6]3−, [CoF6]3−, [Mn(CN)6]3−, and [MnCl6]3−

  1. (A)

    4

  2. (B)

    3

  3. (C)

    5

  4. (D)

    6

Answer: (B)

Step-by-step solution

JEE Main 2025 · 7 Apr · Shift 2 · Crystal Field Theory

The number of paramagnetic metal complex species among [Co(NH3)6]3+,[Co(C2O4)3]3−\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+},\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}, [MnCl6]3−,[Mn(CN)6]3−,[CoF6]3−,[Fe(CN)6]3−\left[\mathrm{MnCl}_6\right]^{3-},\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-} and [FeF6]3−\left[\mathrm{FeF}_6\right]^{3-} with same number of unpaired electrons is __________.

Answer: 2

Step-by-step solution

JEE Main 2025 · 7 Apr · Shift 1 · Isomerism in Coordination Compounds

An octahedral complex having molecular composition Co⋅5NH3⋅Cl2.SO4\mathrm{Co} \cdot 5 \mathrm{NH}_3 \cdot \mathrm{Cl}^2 . \mathrm{SO}_4 has two isomers A and B. The solution of A gives a white precipitate with AgNO3\mathrm{AgNO}_3 solution and the solution of B gives white precipitate with BaCl2\mathrm{BaCl}_2 solution. The type of isomerism exhibited by the complex is,

  1. (A) Co-ordinate isomerism
  2. (B) Ionisation isomerism
  3. (C) Geometrical isomerism
  4. (D) Linkage isomerism

Answer: (B)

Step-by-step solution

JEE Main 2025 · 7 Apr · Shift 2 · Werner's Theory and Terminology

Match List - I with List - II.

List - I (Complex) List - II (Primary valency and Secondary valency)
(A) [Co(en)2Cl2]Cl (I) 3,    6
(B) [Pt(NH3)2Cl(NO2)] (II) 3,    4
(C) Hg [Co(SCN)4] (III) 2,    6
(D) [Mg (EDTA)]2− (IV) 2,    4

Choose the correct answer from the options given below :

  1. (A)

    (A)-(I), (B)-(III), (C)-(II), (D)-(IV)

  2. (B)

    (A)-(II), (B)-(III), (C)-(IV), (D)-(I)

  3. (C)

    (A)-(I), (B)-(IV), (C)-(II), (D)-(III)

  4. (D)

    (A)-(III), (B)-(I), (C)-(II), (D)-(IV)

Answer: (C)

Step-by-step solution

JEE Main 2025 · 29 Jan · Shift 2 · Ligands and Coordination Number

Identify the homoleptic complexes with odd number of dd electrons in the central metal :

(A) [FeO4]2−\left[\mathrm{FeO}_4\right]^{2-}

(B) [Fe(CN)6]3−\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}

(C) [Fe(CN)5NO]2−\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NO}\right]^{2-}

(D) [CoCl4]2−\left[\mathrm{CoCl}_4\right]^{2-}

(E) [Co(H2O)3 F3]\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_3 \mathrm{~F}_3\right]

Choose the correct answer from the options given below :

  1. (A)

    (C) and (E) only

  2. (B)

    (A), (B) and (D) only

  3. (C)

    (B) and (D) only

  4. (D)

    (A), (C) and (E) only

Answer: (C)

Step-by-step solution

JEE Main 2023 · 11 Apr · Shift 1 · Stability of Complexes

The complex that dissolves in water is :

  1. (A)Fe4[Fe(CN)6]3\mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}
  2. (B)(NH4)3[As(Mo3O10)4]\left(\mathrm{NH}_{4}\right)_{3}\left[\mathrm{As}\left(\mathrm{Mo}_{3} \mathrm{O}_{10}\right)_{4}\right]
  3. (C)K3[Co(NO2)6]\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]
  4. (D)[Fe3(OH)2(OAc)6]Cl\left[\mathrm{Fe}_{3}(\mathrm{OH})_{2}(\mathrm{OAc})_{6}\right] \mathrm{Cl}

Answer: (D)

Step-by-step solution

All 120 questions are in the free PDF above, grouped by topic.

Frequently asked

How many questions come from Coordination Compounds in JEE Main?

120 questions from 2020 to 2025, about 20 per year. In 2025 it had 20.

Which Coordination Compounds topics are most important for JEE Main?

By past papers: Crystal Field Theory (47%), Ligands and Coordination Number (13%) and Isomerism in Coordination Compounds (12%) of all Coordination Compounds questions.

Is the Coordination Compounds PYQ PDF free?

Yes. The PDF, the answer key and every step-by-step solution on PrepWiser are free, with no login needed to practise.

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