Question

What type(s) of intermolecular forces exist between the following pair?

$HBr$ and $H_{2}S$

• A. Dipole-dipole intermolecular forces
• B. Induced dipole interactions
• C. Hydrogen bonding
• D. None of the above

Answer 1

The correct option is A Dipole-dipole intermolecular forces

To identify intermolecular forces, it is useful to classify the species being considered as (1) non-polar molecules, (2) polar molecules, and (3) ions. Keep in mind that dispersion forces exist between all species. Due to the large electronegativity difference between hydrogen and bromine/sulfur, the $H-Br$ bond and $H-S$ bond are polar. The molecular interactions, thus, are dipole-dipole interactions.