Which of the following is the strongest intermolecular force?

• A. Dipole-dipole force
• B. Ion-dipole force
• C. Dispersion force
• D. Hydrogen bond

Answer: (B)

Verified step by step guidance

1. Identify the types of intermolecular forces listed: dipole-dipole force, ion-dipole force, dispersion force, and hydrogen bond.
2. Understand that intermolecular forces are attractions between molecules, and their strength varies based on the nature of the interacting particles.
3. Recall that dispersion forces, also known as London dispersion forces, are the weakest intermolecular forces and occur in all molecules, especially nonpolar ones.
4. Recognize that dipole-dipole forces occur between polar molecules, where the positive end of one molecule is attracted to the negative end of another.
5. Ion-dipole forces are the strongest among the listed options, as they occur between an ion and a polar molecule, where the full charge of the ion interacts with the partial charge of the dipole, creating a strong attraction.