(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

Explanation

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