1.

[Co(NH_3)_6]^(3+)is diamagnetic where as [CoF_6]^(3-)is paramagnetic explain.

Answer»

SOLUTION :`[Co(NH_3) _6]^(3+) ` is DIAMAGNETIC because `NH_3` is a strong field ligand CAUSES PAIRING of electrons in d orbitals and there is no unpaired electrons
(ii)`[CoF_6]^(3+) ` is paramagnetic because `F^(-)` is a weak field ligand does not cause pairing of electrons and there are unpaired electrons.


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