Question

Which of the following is TRUE regarding the origin of dipole forces between molecules?

• A. It comes from strong charges in molecules due to highly polar bonds between hydrogen and oxygen, hydrogen and fluorine, or hydrogen and nitrogen.
• B. They result from the interactions between positive and negative ions.
• C. They result from the attraction of temporary regions of positive and negative charges that arise in molecules.
• D. They result from the attraction of the positive and negative ends of separate polar molecules.

Answer 1

The correct option is D They result from the attraction of the positive and negative ends of separate polar molecules.

A dipole-dipole is an intermolecular force that occurs between two polar molecules. They occur when the slightly positive end of one polar molecule is attracted to the slightly negative end of another polar molecule. These forces are weaker bonds than Hydrogen bonds but stronger than London Dispersion forces.