Final answer:
When intermolecular forces in a liquid increase, the normal boiling point of the liquid increases, the vapor pressure of the liquid does not change, the vapor pressure increases when the surface area increases, and the equilibrium vapor pressure increases when the temperature of a liquid decreases.
Step-by-step explanation:
a) If the intermolecular forces in a liquid increase, the normal boiling point of the liquid increases.
b) If the intermolecular forces in a liquid increase, the vapor pressure of the liquid does not change.
c) If the surface area of a liquid increases, the vapor pressure increases.
d) If the temperature of a liquid decreases, the equilibrium vapor pressure increases.