A magnetic moment of 1.73 B.M. will be shown by one among the following:

Options

A. `[Cu(NH_(3))_(4)]^(2+)`
B. `[Ni(CN)_(4)]^(2-)`
C. `TiCl_(4)`
D. `[CoCl_(6)]^(4-)`

Answer

A

Explanation

`[Cu(NH_(3))_(4)]^(2+)`
`Cu^(2+)=[Ar]3d^(9)" " n=1`
`mu=sqrt(n(n+2))" "B.M.`
`mu=sqrt(1(1+2))`
`mu=sqrt(3)`
`mu=1.73 B.M.`