Question

Why the dipole moment of chlorobenzene is lower than cyclo hexyl chloride

Answer 1

Hence chlorobenzene is more electronegative than cyclohexyl chloride. Therefore, the density of electrons C-Cl bond at chlorine atom is less in chlorobenzene than cyclohexyl chloride. Due to this polarity of the C-Cl bond decreases and hence dipole moment of chlorobenzene is lower than cyclohexyl chloride.

Answer 2

The main reason is the Electronegativity of Cyclohexane is less than that of Chlorobenzane. And Hence, The Dipole Moment of  Chlorobenzane is less.