S-1 : `[Cr(NH_(3))_(6)]^(3+)` is a inner orbital complex with
S-2: The complex formed by joining the CN ligands to `Fe^(3+)` ion has theoretical value fo 'spin only' magnetic moment equal to 1.73 B.M.
S-3: `Na_(2)S+Na_(2)[Fe(CN)_(5)NO]rarrNa_(4)[Fe(CN)_(5)NOS],` In reactan and product the oxidation states of iron are same

Options

A. FTF
B. TTF
C. TTT
D. FFF

Answer

C

Explanation

hybridisation is `d^(2)sp^(3)` (`NH_()` is strong field ligand )
`S_(2):Fe^(3+),3d^(5)`-one unpaired electron after pairing (`CN^(-)` is stronger field ligand )
`:. Mu=sqrt(1+(1+2))~~1.73BM`
`S_(3):[overset(II" "-5)(Fe(CN)_(5))NO]^(2-) and [overset(II" "-5)(Fe(CN)_(5))NOS^(=2)]^(4-)`
In reactant and product, the iron is in same oxidation stats i.e. +2.