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Correct order of paramagnetism of tripos...

Correct order of paramagnetism of tripositive cation of Cr, Mn, Fe, Co is :

A

`Crlt Mn lt Felt Co`

B

`Crlt Mn = Felt Co`

C

`Cr = Fe lt Mn lt Co`

D

`Cr lt Mn = Co lt Fe`

Text Solution

Verified by Experts

The correct Answer is:
D
No. of unpaired electron
`{:(Cr^(+3),=,[Ar]4s3d3d^(3),rarr,3,),(Mn^(+3),=,[Ar]3d^(4)4s^(0),rarr,4,),(Fe^(+3),=,[Ar]3d^(5)4s^(0),rarr,5,),(Co^(+3),=,[Ar]3d^(6)4s^(0),rarr,4,):}`
`Cr^(+3) lt Mn^(+3) -= Co^(+3) lt Fe^(+3)`
`Cr lt Mn = Co lt Fe`
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