Question

The boiling point of alkyl halide are higher than those of corresponding alkanes because of

• A. dipole-dipole interaction
• B. dipole-induced dipole interaction
• C. H-bonding
• D. None of the above

Answer 1

Answer: (A)

dipole-dipole interaction

Answer 2

Due to dipole-dipole interactions the boiling point of alkyl halide is higher as compared to corresponding alkanes. Alkanes, being non polar, have weak van der walls forces of attraction. In alkyl halides, $C - X$ bond is polar. Hence, strong dipoledipole interactions are present. Greater is the strength of intermolecular forces, higher is the boiling point.