Which of the following compounds has the highest dipole moment (D) ?

Options

A. HBr
B. `CH_(3)COCH_(3)`
C. `H_(2)S`
D. `COCl_(2)`

Answer

B

Explanation

(a) Dipole moment of HBr

(b) Dipole moment of acetone

due to methyl group, (ERG) lies in direction of oxygen therefore, net dipole moment increases.
`mu_("net")=2.69D`
(c) Dipole moment of `H_(2)S`

(d)Dipole moment of `COCl_(2)`

due of Cl atom net dipole moment decreases.
`mu_("net")=0.69D`
Hence, acetone has highest dipole moment.