WAEC Physics 2017 Paper

Concept:The kinetic molecular theory describes how closely packed particles are and how freely they move in the three states of matter.Explanation:In solids, particles are closely packed and only vibrate about fixed positions.This gives solid molecules very little freedom of movement.In liquids, molecules are less closely packed and can slide past one another.In gases, molecules are far apart and move almost freely.Therefore, solids do not have more freely moving molecules than liquids or gases.Option B is correct because solid molecules are more closely packed than liquid molecules.Option C is correct because breaking intermolecular forces requires energy.Option D is correct because liquid molecules are in constant motion within the liquid.Thus, the false statement is Option A.Answer:Option A: Molecules of solids move more freely than molecules of liquids and gases.