Final answer:
HNO₃ (Nitric Acid) has the largest hydrogen-bond forces among the given substances because it can form hydrogen bonds due to the hydrogen being covalently bonded to oxygen.
Step-by-step explanation:
Among the substances Ar, Cl₂, CCl₄, and HNO₃, the one with the largest hydrogen-bond forces is D) HNO₃ (Nitric Acid). Hydrogen bonding occurs when a hydrogen atom is covalently bonded to a highly electronegative atom such as oxygen, nitrogen, or fluorine, and is also attracted to another electronegative atom. In nitric acid, hydrogen is bonded to oxygen and can participate in hydrogen bonding. Argon (Ar), being an inert gas, has very weak London dispersion forces. Chlorine (Cl₂) also has only London dispersion forces, and carbon tetrachloride (CCl₄) is a nonpolar molecule that has neither hydrogen bonds nor any significant dipole-dipole interactions, but it does have London dispersion forces. Therefore, HNO₃ will have the strongest intermolecular forces due to hydrogen bonding.