Question

glycerol boils at a higher temperature than water. what does this indicate about the attractive forces of glycerol?
they are nonexistent
they are the same as those in water
they are stronger than those in water
they are weaker than those in water

Explanation:

Boiling point is related to the strength of intermolecular attractive forces. A higher boiling point means more energy is needed to break the attractive forces between molecules. Since glycerol boils at a higher temperature than water, its attractive forces must be stronger than those in water. The option "They are nonexistent" is wrong as all substances have intermolecular forces. "They are the same as those in water" would mean same boiling point, which is not the case. "They are weaker than those in water" would mean lower boiling point, which contradicts the given info.

Answer:

C. They are stronger than those in water