Intramolecular and Interparticle Force Practice Test

Consider CO$_2$ (linear; nonpolar) and HCN (linear; polar; H bonded to C, not N). Both have similar molar masses. Which statement correctly identifies the strongest type of intermolecular force present in pure HCN?

A student compares the attractions in liquid HF and liquid F$_2$. HF is polar and has an H–F bond; F$_2$ is nonpolar. Which statement correctly identifies the strongest intermolecular force in each liquid?