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Chemistry - Coordination Compounds

Practise 17 IAT (IISER) previous year questions on Coordination Compounds, compiled from papers spanning 2017 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty IAT (IISER) tests.

Coordination Compounds has been asked in 7 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 17 questions in all. 6% of them were easy, 82% moderate and 12% tough. Most of its questions came from 2017, with 4 questions that year. In the last three years (2023–2026) it had 4 questions across 3 papers, about 1.3 per paper.

The chapter's 5 topics are not weighted equally: Crystal Field Theory (7 questions, 41%), Werner's theory and Valence Bond Theory (5 questions, 29%), and Isomerism of coordination compounds (3 questions, 18%) have been asked the most. Crystal Field Theory has also led over the last five years, with 3 questions. Isomerism of coordination compounds has produced the most tough questions (1).

  1. 1Which one of the following octahedral complexes has the highest spin-only magnetic moment?2026Crystal Field Theory
  2. 2Metal-ligand -bond formation in and requires electron-pair donation between metal and ligand orbitals. Which one of the following represents2026Metal Carbonyls & Bonding in Metal Carbonyls
  3. 3Consider the following reaction scheme: Which among the following statements is correct?2025Isomerism of coordination compounds
  4. 4Which of the following complexes exhibit(s) magnetic moment close to 2 Bohr Magneton?2024Werner's theory and Valence Bond Theory
  5. 5The following complex ions absorb in the ultraviolet-visible region of light. Which one of these shows violet colour?2024Crystal Field Theory
  6. 6The products of the reaction between aqueous solutions of and are2022Terminology of coordination compounds
  7. 7For the colourless complex , where M is a transition metal, the CORRECT ground state -electron configuration of M is2022Crystal Field Theory
  8. 8Which one of the following statements is INCORRECT about a complex of a divalent ion with atomic number 25 ?2021Werner's theory and Valence Bond Theory
  9. 9is diamagnetic because2021Werner's theory and Valence Bond Theory
  10. 10The number of unpaired electron(s) in the square planar complex is/are2020Werner's theory and Valence Bond Theory
  11. 11Which one of the following aqueous solutions gives the most intense colour?2020Crystal Field Theory
  12. 12Which is the appropriate combination of spin configuration and colour for the anionic complex is a monodentate and monoanionic ligand2019Crystal Field Theory
  13. 13How many geometrical isomers are possible for the square planar complex pyridine2019Isomerism of coordination compounds
  14. 14dissolves in a solution containing ions to form . What would be the geometry of ?2017Werner's theory and Valence Bond Theory
  15. 15A complex of metal has the following electronic distribution in orbitals, The neutral M has a ground state electronic configuration of . Whi2017Crystal Field Theory
  16. 16Identify the complex that can exist as a pair of enantiomers.2017Isomerism of coordination compounds
  17. 17Which of the following complexes is expected to be colored?2017Crystal Field Theory

Frequently Asked Questions

1.How many questions are available for Coordination Compounds?

This chapter includes 17 questions compiled from IAT (IISER) papers spanning 2017 to 2026.

2.Are these questions only from IAT (IISER), or from other exams too?

These are IAT (IISER) questions specifically for the Coordination Compounds chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Coordination Compounds an important chapter for IAT (IISER) Chemistry?

Coordination Compounds has appeared in 8 of the 10 years of IAT (IISER) papers covered here, with 17 questions across 8 papers - about 2 per paper it appears in.

4.What is the difficulty level of Coordination Compounds questions in IAT (IISER)?

Of the 17 questions analysed for this chapter, 6% are easy, 82% moderate and 12% tough. 2017 had the most, with 4 questions.

5.Which topics in Coordination Compounds should I focus on?

These topics have carried the most weightage in Coordination Compounds:

  • Crystal Field Theory - 7 questions (41%)
  • Werner's theory and Valence Bond Theory - 5 questions (29%)
  • Isomerism of coordination compounds - 3 questions (18%)
  • Isomerism of coordination compounds has produced the most tough questions (1).
6.Is Coordination Compounds's weightage in IAT (IISER) going up or down?

Across all 8 papers analysed, Coordination Compounds has averaged about 2.1 questions per paper. In the last three years (2023–2026), that average has fallen, at about 1.3 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.