Verified Solution • 2025–26 Session moderate

QJEEM20Ch2620: JEE Main 2020 Chemistry - Class 12 JEEM20Ch2620 Solution: The one that can exhibit highest paramagnetic behaviour among…

The one that can exhibit highest paramagnetic behaviour among the following is :

gly = glycinato; bpy = 2, 2'-bipyridine

Multiple Choice Options

  • A [Fe(en)(bpy)(NH3)2]2+
  • B [Pd(gly)2]
  • C [Co(OX)2(OH)2]– (Δ0 > P)
  • D [Ti(NH3)6]3+

Step-by-Step Verified Solution

[Co(OX)2(OH)2]–

(As here Δ0 > P so those ligands act as strong field ligand and pairing happens.)

27Co+5 = [18Ar] 3d4 4s0( t2g2,1,1,eg0,0 )

It has highest number of unpaired e– s. so it is most paramagnetic.

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