Arrange the following in increasing value of magnetic moments.
(i) `[Fe(Cn)_6]^(4-)` (ii) ` [Fe(CN)_6]^(3-)`
(iii) `[Cr(NH_3)_6]^(3+)` (iv) `[Ni(H_2O)_4]^(2+)`

Options

A. (i) lt (ii) lt (iii) lt (iv)
B. (i) lt (ii) lt (iv) lt (iii)
C. (ii) lt (iii) lt (i) lt (iv)
D. (iii) lt (i) lt (ii) lt (iv)

Answer

B

Explanation

`{:([Fe(CN)_6]^(4-),"No. of unpaired electrons=0"),([Fe(CN)_6]^(3-),"No. of unpaired electrons=1"),([Ni(H_2O)_4]^(2+),"No. of unpaired electrons=2"),([Cr(NH_3)_6]^(3+),"No. of unpaired electrons=3"):}`