PYQSidePowered byPrepblink ExamsMy practice

Coordination Compounds

JEE Main 2025 (Online) 23rd January Evening ShiftMCQMedium📈 Topic in 8% papers+4−1
Ques. 1JEE Main 2025, 23 January (Evening Shift)

Identify the coordination complexes in which the central metal ion has d4 configuration. Choose the correct answer from the options given below :

  1. B, C and D only
  2. C and E only
  3. A, B and E only
  4. B and D only

Answer

(4) B and D only

Solution

d-electrons = group electrons − oxidation state

A: Fe6+ d2; B: Mn3+ d4 ✓; C: Fe3+ d5

D: Cr2+ (acetate -1, so 2x=4) d4 ✓; E: Ni4+ d6

∴ B and D

Answer: (4)

Keep practising — Coordination Compounds

Ques. 2JEE Main 2025, 22 January (Morning Shift)

From the magnetic behaviour of [NiCl4]2- (paramagnetic) and [Ni(CO)4] (diamagnetic), choose the correct geometry and oxidation state.

  1. [NiCl4]2- : Ni(0), tetrahedral [Ni(CO)4] : Ni(0), square planar
  2. [NiCl4]2- : NiII, tetrahedral [Ni(CO)4] : Ni(0), tetrahedral
  3. [NiCl4]2- : NiII, tetrahedral [Ni(CO)4] : NiII, square planar
  4. [NiCl4]2- : NiII, square planar [Ni(CO)4] : Ni(0), square planar
Ques. 3JEE Main 2025, 22 January (Morning Shift)

In which of the following complexes the CFSE, o will be equal to zero?

  1. K3[Fe(SCN)6]
  2. [Fe(en)3]Cl3
  3. [Fe(NH3)6]Br2
  4. K4[Fe(CN)6]
Ques. 4JEE Main 2025, 22 January (Evening Shift)

The correct order of the following complexes in terms of their crystal field stabilization energies is :

  1. [Co(NH3)4]2+ < [Co(NH3)6]2+ < [Co(NH3)6]3+ < [Co(en)3]3+
  2. [Co(NH3)4]2+ < [Co(NH3)6]2+ < [Co(en)3]3+ < [Co(NH3)6]3+
  3. [Co(NH3)6]2+ < [Co(NH3)6]3+ < [Co(NH3)4]2+ < [Co(en)3]3+
  4. [Co(en)3]3+ < [Co(NH3)6]3+ < [Co(NH3)6]2+ < [Co(NH3)4]2+
Ques. 5JEE Main 2025, 22 January (Evening Shift)

Identify the homoleptic complex(es) that is/are low spin. Choose the correct answer from the options given below :

  1. C and D only
  2. C only
  3. A and C only
  4. B and E only
Ques. 6JEE Main 2025, 22 January (Evening Shift)

The complex of Ni2+ ion and dimethyl glyoxime contains number of Hydrogen (H) atoms.

All Coordination Compounds PYQs →

PDFDownload Coordination Compounds PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolutionsElectrochemistryChemical Kinetics
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular Structurep-Block Elements (Group 13 & 14)p-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPrinciples Related to Practical Chemistry