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Chemistry - Coordination Compounds

Practise 54 AIIMS previous year questions on Coordination Compounds, compiled from papers spanning 2001 to 2019. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AIIMS tests.

Coordination Compounds has been asked in 18 of the 19 years of AIIMS papers analysed (2001–2019), with 54 questions in all. 46% of them were easy, 33% moderate and 20% tough. Most of its questions came from 2007, with 6 questions that year. In the last three years (2017–2019) it had 9 questions across 5 papers, about 1.8 per paper.

The chapter's 7 topics are not weighted equally: Crystal Field Theory (17 questions, 31%), Isomerism of coordination compounds (10 questions, 19%), and Terminology of coordination compounds (9 questions, 17%) have been asked the most. Isomerism of coordination compounds has produced the most tough questions (5).

  1. 1Which of the following complex is optically inactive?26 May, 2019Isomerism of coordination compounds
  2. 2Correct increasing order for the wavelength of absorption in the visible region for the complexes of is26 May, 2019Crystal Field Theory
  3. 3Which one of the following complexes shows optical isomerism?25 May, 2019Isomerism of coordination compounds
  4. 4Trien is27 May, 2018Terminology of coordination compounds
  5. 5Which of the following is a pair of diamagnetic complexes?27 May, 2018Werner's theory and Valence Bond Theory
  6. 6Which of the following can be reduced easily?26 May, 2018Carbonyl Compounds
  7. 7Assertion : In Zeise's salt coordination number of is five. Reason : Ethene is a bidentate ligand.26 May, 2018Terminology of coordination compounds
  8. 8Among the following, the compound that is both paramagnetic and coloured is2017Werner's theory and Valence Bond Theory
  9. 9Assertion : has type hybridisation. Reason: ion shows magnetic moment corresponding to two unpaired electrons.2017Werner's theory and Valence Bond Theory
  10. 10Select the correct statement.2016Isomerism of coordination compounds
  11. 11Assertion : and are isomers. Reason : is a stronger ligand as compared to .2016Isomerism of coordination compounds
  12. 12The diamagnetic species is2015Werner's theory and Valence Bond Theory
  13. 13Amongst the following, the most stable complex is2015Stability of complex ion
  14. 14Assertion: is a weaker ligand than . Reason : ionizes to give ions in aqueous solution.2015Terminology of coordination compounds
  15. 15Least coordination number is shown by2014Terminology of coordination compounds
  16. 16Assertion: Linkage isomerism arises in coordination compounds containing ambidentate ligand. Reason: Ambidentate ligand has two different do2014Isomerism of coordination compounds
  17. 17Assertion : EDTA forms complex with divalent metals of -series in the ratio of Reason : EDTA has groups.2013Terminology of coordination compounds
  18. 18Assertion : In a mixture of and , gets precipitated in presence of by . Reason : The stability constant of is greater than .2013Stability of complex ion
  19. 19Assertion : Aq. solution of is pink in colour. It turns blue in presence of conc. . Reason : It is due to the formation of .2013Crystal Field Theory
  20. 20Assertion : ion is a weak ligand and forms outer orbital complex. Reason : ion cannot force the electrons of and orbitals of the inner shell2012Terminology of coordination compounds
  21. 21Assertion : is paramagnetic. Reason : The Fe in has three unpaired electrons.2012Werner's theory and Valence Bond Theory
  22. 22The wavelength of light absorbed is highest in2011Crystal Field Theory
  23. 23Which of the following is diamagnetic?2011Werner's theory and Valence Bond Theory
  24. 24Match list I with list II and select the correct answer using the codes given below the lists. Codes2010Werner's theory and Valence Bond Theory
  25. 25A complex shows a molar conductance of in water and precipitates three moles of with solution. The formula of the complex is2010Terminology of coordination compounds
  26. 26is named as tetrakis (ethylene-diammine) -hydroxo-m-imido dicobalt (III) ion. Reason : In naming polynuclear complexes i.e., containing two 2010Nomenclature of coordination compounds
  27. 27combines with to form . This compound contains the species2009Terminology of coordination compounds
  28. 28Assertion : In high spin situation, configuration of \(d^5\) ions will be \(t_{2 g}^3 e_g^2\) Reason : In high spin situation, pairing energ2008Crystal Field Theory
  29. 29During estimation of nickel, we prepare nickel dimethylglyoxime, a scarlet red solid. This compound is ____.2007Crystal Field Theory
  30. 30Which of the following metal ions will form complexes with the same magnetic moment and geometry irrespective of the nature of ligands?2007Werner's theory and Valence Bond Theory
  31. 31Wavelength of red light is absorbed by the complex2007Crystal Field Theory
  32. 32In the change \( [ {Cu} ( {H}_2 {O} )_6 ]^{2+} { {HCl}}{ } [ {CuCl} ( {H}_2 {O} )_5 ]^{+}\), the colour changes from2007Crystal Field Theory
  33. 33is true for ferrocene?2007Carbonyl Compounds
  34. 34Assertion : \( {C}- {O}\) bond in metal carbonyl is long. Reason : There is delocalisation of electrons from filled \(d\) orbitals into the 2007Carbonyl Compounds
  35. 35The pair in which both species have same magnetic moment (spin only value) is2006Crystal Field Theory
  36. 36The number of possible isomers of an octahedral complex is2006Isomerism of coordination compounds
  37. 37Among the following, the species having square planar geometry for central atom are (i) , (ii) , (iii) , (iv)2006Crystal Field Theory
  38. 38Assertion : does not show optical isomerism. Reason : It has a plane of symmetry.2006Isomerism of coordination compounds
  39. 39An aqueous solution of on addition of excess of concentrated turns blue due to formation of2005Crystal Field Theory
  40. 40In which of the following pairs both the complexes show optical isomerism?2005Isomerism of coordination compounds
  41. 41The diamagnetic species is2005Isomerism of coordination compounds
  42. 42The correct order for the wavelength of absorption in the visible region is2005Crystal Field Theory
  43. 43Assertion : Potassium ferrocyanide is diamagnetic whereas potassium ferricyanide is paramagnetic. Reason : Crystal field splitting in ferroc2005Crystal Field Theory
  44. 44Which one of the following forms with an excess of (cyanide) a complex having coordination number two?2004Crystal Field Theory
  45. 45Which of the following is not considered as an organometallic compound?2004Carbonyl Compounds
  46. 46Which of the following does not have optical isomer?2004Isomerism of coordination compounds
  47. 47Assertion : The (en = ethylene diamine) has lower stability than . Reason : In the geometry of is trigonal bipyramidal.2004Stability of complex ion
  48. 48The complex used as an anti-cancer agent is2003Stability of complex ion
  49. 49The colourless species is2003Crystal Field Theory
  50. 50The ligand called acid is2003Carbonyl Compounds

Frequently Asked Questions

1.How many questions are available for Coordination Compounds?

This chapter includes 54 questions compiled from AIIMS papers spanning 2001 to 2019.

2.Are these questions only from AIIMS, or from other exams too?

These are AIIMS questions specifically for the Coordination Compounds chapter. Questions from other exams like NEET or JIPMER are organised separately under their respective exam sections.

3.Is Coordination Compounds an important chapter for AIIMS Chemistry?

Coordination Compounds has appeared in 18 of the 19 years of AIIMS papers covered here, with 54 questions across 20 papers - about 3 per paper it appears in.

4.What is the difficulty level of Coordination Compounds questions in AIIMS?

Of the 54 questions analysed for this chapter, 46% are easy, 33% moderate and 20% tough. 2007 had the most, with 6 questions.

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

These topics have carried the most weightage in Coordination Compounds:

  • Crystal Field Theory - 17 questions (31%)
  • Isomerism of coordination compounds - 10 questions (19%)
  • Terminology of coordination compounds - 9 questions (17%)
  • Isomerism of coordination compounds has produced the most tough questions (5).
6.Is Coordination Compounds's weightage in AIIMS going up or down?

Across all 20 papers analysed, Coordination Compounds has averaged about 2.7 questions per paper. In the last three years (2017–2019), that average has fallen, at about 1.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.