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Which of the following has least oxidati...

Which of the following has least oxidation state of Fe?

A

`K_(3)[FeO_(4)]`

B

`K_(2)[FeO_(4)]`

C

`FeSO_(4).(NH_(4))_(2)SO_(4).6H_(2)O`

D

`[Fe(CN)_(6)]^(3-)`

Text Solution

Verified by Experts

The correct Answer is:
C
In mohr salt `FeSO_(4).(NH_(4))_(2)SO_(4).6H_(2)O` oxidation state of iron is +2 which is least.
`K_(3)[Fe(OH)_(6)]" " "+3+x-6=0 x=+3"`
`K_(2)[FeO_(4)]" ""+2+x-8=0 x=+6"`
`FeSO_(4).(NH_(4))_(2)SO_(4).6H_(2)O "+2 state in" FeSO_(4) (x-2=0)`
`Fe(CN)_(6)^(3-) " x-6=-3 x=+3]"`
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