Question

Two liquids A and B can form an ideal solution only when the A-B molecular interaction forces are ______ to the A-A or B-B interaction forces.

Answer 1

Two liquids A and B can form an ideal solution only when the A-B molecular interaction forces are similar to the A-A or B-B interaction forces.

Explanation:

Ideal solutions follow Raoult’s Law perfectly. This happens when no heat is absorbed or evolved and no volume change occurs upon mixing, i.e., ΔH_mix = 0, ΔV_mix = 0.

This condition is satisfied only when the intermolecular interactions between A and B molecules are the same as the interactions between A and A molecules and also the same as the interactions between B and B molecules.