Which of the following is NOT an example of an intermolecular force?

• A. Dipole-dipole interactions
• B. Hydrogen bonding
• C. London dispersion forces
• D. Ionic bonding

Answer: (D)

Verified step by step guidance

1. Step 1: Understand what intermolecular forces are. Intermolecular forces are forces of attraction or repulsion that act between neighboring molecules, affecting properties like boiling point and solubility.
2. Step 2: Review the given options and identify which are intermolecular forces. Dipole-dipole interactions occur between polar molecules, hydrogen bonding is a special strong dipole-dipole interaction involving H and N, O, or F, and London dispersion forces are weak forces present in all molecules due to temporary dipoles.
3. Step 3: Recognize that ionic bonding is different from intermolecular forces. Ionic bonding is an intramolecular force, meaning it is the force that holds ions together within an ionic compound, not between separate molecules.
4. Step 4: Conclude that since ionic bonding occurs within compounds and not between molecules, it is NOT an example of an intermolecular force.
5. Step 5: Summarize that the correct answer is ionic bonding because it is a type of chemical bond (intramolecular force), whereas the other options are all types of intermolecular forces.