(i) `[Co ( H_(2) O)_(6) ]^(n-6)`
(ii)`[PtCl_(2) BrF]^(2-)` m geometrical isomers
The spin only magnetic moment of complex (i) is 3.87 . The value of `m +n ` is

Options

A. 8
B. 9
C. 10
D. 11

Answer

D

Explanation

(i) `[Co(H_(2)O)_(6)]^(2+)," number of unpaired "e^(-)=3, mu=sqrt(15)B.M.`
`n-6=+2`
`n=+8`
(ii) `[PtCl_(2)BrF]^(-2)`
`dsp^(3)` hybridization square planar, total three isomers
`8+3=11`