Which of the following is NOT an intermolecular attraction?

• A. Dipole-dipole interaction
• B. Covalent bond
• C. Hydrogen bonding
• D. London dispersion force

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the difference between intermolecular and intramolecular forces. Intermolecular forces are attractions between molecules, while intramolecular forces are bonds within a molecule.
2. Step 2: Identify each option's nature: Dipole-dipole interactions, hydrogen bonding, and London dispersion forces are all types of intermolecular forces that occur between molecules.
3. Step 3: Recognize that a covalent bond is an intramolecular force, meaning it holds atoms together within a molecule rather than between molecules.
4. Step 4: Conclude that since covalent bonds are not forces between molecules but rather within molecules, they are NOT intermolecular attractions.
5. Step 5: Therefore, the correct answer is the covalent bond, as it does not represent an intermolecular attraction.