Which of the following statements is correct?
A) Dipole-dipole interactions occur only between nonpolar molecules.
B) A hydrogen bond is an extremely weak dipole-dipole interaction.
C) London forces are "instantaneous" dipole-dipole interactions.
D) Hydrogen bonding occurs anytime a hydrogen-containing molecule is present in a liquid.

Question

Quizplus · Accepted Answer

London forces, also known as dispersion forces, are the weakest of the intermolecular forces and occur between all molecules, whether polar or nonpolar. These forces arise from the temporary distortion of electron density around a molecule, creating a temporary dipole that can induce a similar dipole in nearby molecules, leading to attraction between them. This is why London forces are sometimes referred to as "instantaneous" dipole-dipole interactions. Dipole-dipole interactions, on the other hand, occur only between polar molecules and arise from the attraction between the partial positive end of one molecule and the partial negative end of another. Hydrogen bonding, which is a special type of dipole-dipole interaction, occurs only when hydrogen is covalently bonded to a highly electronegative atom such as oxygen, nitrogen, or fluorine, and it is not present in all liquids.

Which of the Following Statements Is Correct