What intermolecular force(s) is(are) present among molecules of HBr?
I. London dispersion
II. Dipole-dipole
III. Hydrogen bonding

Question

Quizplus · Accepted Answer

HBr is a polar molecule due to the electronegativity difference between H and Br atoms. Thus, dipole-dipole interactions are present between HBr molecules. Additionally, the molecule has temporary dipoles formed by the fluctuation of electron density around the Br atom, which results in London dispersion forces. However, hydrogen bonding cannot occur among HBr molecules because there is no hydrogen atom bonded to a highly electronegative atom like N, O, or F. Therefore, the correct answer is (D) I and II.

What Intermolecular Force(s) Is(are) Present Among Molecules of HBr