JEE Mains Chemistry Past PapershardMCQ SINGLE

[Co(NH3)6]3+ and [CoF6]3– are respectively known as: (A) Spin free Complex, Spin paired Complex (B) JEE Mains Chemistry Past Papers Chemistry Question

Question

[Co(NH3)6]3+ and [CoF6]3– are respectively known as: (A) Spin free Complex, Spin paired Complex (B) Spin paired Complex, Spin free Complex (C) Outer orbital Complex, Inner orbital Complex (D) Inner orbital Complex, Spin paired Complex

Answer: B

💡 Solution & Explanation

[Co(NH3)6]3+ Co3+ (strong field ligand)  3d6  g g t ,e 0 , Hybridisation : d2sp3 Inner obital complex(spin paired complex) Pairing will take place. [CoF6]3– Co3+ (weak field ligand)  3d6  g g t ,e 2 Hybridisation : sp3d2 Outer orbital complex (spin free complex) no pairing will take place

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