Unparid electrons in `[FeCI_(6)]^(3+)` and `[Fe(CN)_(4)]^(2-)` and respectively

Options

A. 5 and 2
B. 5 and 1
C. 3 and 2
D. 2 and 3

Explanation

(b) In the formation of `FeCI_(6)^(3-)` complex , `CN^(-)` do not cause pairing because it is a wek field llgand, number of unpaired electrons are five .
On the other hand , in `Fe(CN)_(6)^(2-)` complex `CN^(-)` is a strong filled ligand, it cause pairing so the number of unpairid electron is one.