The dipole moment of o, p and m-dichlorobenzene will be in the order : — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: The dipole moment of disubstituted benzene derivatives is determined by the vector addition of the two individual C-Cl bond dipoles. Step 2: In ortho-dichlorobenzene, the bond angle between the two C-Cl dipoles is 60° (maximum reinforcement). In meta-dichlorobenzene, the angle is 120°. In para-dichlorobenzene, the angle is 180°, so the dipoles point in opposite directions and cancel out completely (μ = 0). Step 3: Consequently, the dipole moments follow the order of ortho > meta > para. Thus, the correct option is (d).