Question

The boiling points of organohalogen compounds are comparatively higher than the corresponding hydrocarbons because of}

• A. electrostatic attraction
• B. covalent bonding
• C. weak dipole-dipole interaction
• D. dipole-induced dipole interaction
• E. strong dipole-dipole interaction and van der Waals forces of attraction

Hint:

Boiling point increases when intermolecular forces increase. In haloalkanes, both polarity and molecular mass usually raise the boiling point.

Answer 1

Answer: (E)

Organohalogen compounds are generally more polar than the corresponding hydrocarbons because of the polar carbon-halogen bond. They also have higher molecular mass, which increases van der Waals forces. So their boiling points are higher mainly because of:

• dipole-dipole interactions
• van der Waals forces

Hence, the correct answer is: \[ \boxed{(E)} \]