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Which of the following is paramagnetic?...

Which of the following is paramagnetic?

A

`K_(4)[Fe(CN)_(6)]`

B

`K_(3)[Fe(CN)_(6)]`

C

`Ni(CO)_(4)`

D

`[Co(NH_(3))_(6)]Cl_(3)`

Text Solution

Verified by Experts

The correct Answer is:
B
`K_(3)[Fe(CN)_(6)]` has Fe in `+3` oxidation state and `d^(5)` configuration. At the time of bonding two of the five electrons get paired and one of the electron remains unpaired giving paramgnetic character.
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