Question

Boiling point of hydrogen fluoride is highest amongst HF, HCl, HBr and HI. Which type of intermolecular forces are present in hydrogen fluoride?

• A. H-F has highest van der Walls’ forces and dipole moment.
• B. H – F has highest London forces.
• C. H–F has highest dipole moment hence has dipole, London forces and hydrogen bonding.
• D. H – F has strong intermolecular interactions like dipole-induced dipole.

Answer 1

Answer: (C)

H–F has highest dipole moment hence has dipole, London forces and hydrogen bonding.

Answer 2

: H-F has dipole-dipole, London forces and hydrogen bonding due to highest electronegativity of F. Hence, boiling point of H – F is highest.