1.

In which of the following complex ion the value of magnetic moment (spin only) is sqrt(3)B.M. and oute rd-orbitals is used in hybridization:

Answer»

`[Fe(NH_(3))_(6)]^(3+)`
`[Mn(CN)_(6)]^(4-)`
`[CuCl_(5)]^(2-)`
`[Co(NH_(3))_(6)]^(2+)`

Solution :`[CuCl_(5)]^(2-),SP^(3)` d-hybridisation (OUTER orbital complex) (MAGNETIC MOMENT`=sqrt(3)` B.M.)
`[Fe(NH_(3))_(6)]^(3+),[Mn(CN)_(6)]^(4-) and [Co(NH_(3))_(6)]^(2+)` are inner orbital complexes and are ALSO paramagnetic in nature having magnetic moment of `sqrt(3)B.M.`


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