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ChemistryJEE Main 24 Jan 2026, Shift 1·Q9·MCQ·Moderate

Coordination Compounds · Magnetic properties of complexes

Given below are two statements

Statement-I : The number of paramagnetic species among [CoFX6]X3−\ce{[CoF6]^{3-}}, [TiFX6]X3−\ce{[TiF6]^{3-}}, VX2OX5\ce{V2O5} and [Fe(CN)X6]X3−\ce{[Fe(CN)6]^{3-}} is 3.

Statement-II : KX4[Fe(CN)X6]\ce{K4[Fe(CN)6]} << KX3[Fe(CN)X6]\ce{K3[Fe(CN)6]} << [Fe(HX2O)X6]SOX4 ⋅ HX2O\ce{[Fe(H2O)6]SO4.H2O} << [Fe(HX2O)X6]ClX3\ce{[Fe(H2O)6]Cl3} is the correct order in terms of number of unpaired electron(s) in the complexes.

In the light of the above statements, choose the correct answer from the options given below.

  1. (1)Both statement-I and statement-II are true
  2. (2)Both statement-I and statement-II are false
  3. (3)Statement-I is true but statement-II is false
  4. (4)Statement-I is false but statement-II is true
We corrected a printing error in the original paper

Source printed “Statements-I :”.

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