Physics 2005 JAMB Past Questions - Question 47: I) melting II)boiling III. Refraction IV.Conduction .which combination of the above is evident of the molecular nature of matter

Correct Answer

A

Explanation

The combination of melting (I) and boiling (II) is evident of the molecular nature of matter.

Melting and boiling are phase changes that occur due to the rearrangement of molecules in a substance. When a solid melts or a liquid boils, the intermolecular forces between the molecules are overcome, and the molecules gain enough kinetic energy to move freely and change their relative positions. This behavior is characteristic of matter composed of discrete, individual molecules, which is a key feature of the molecular nature of matter. Refraction (III) and conduction (IV) are also properties of matter, but they are not directly related to the phase changes that reveal the molecular nature of matter. Refraction is the bending of light as it passes through different materials, and conduction is the transfer of heat or electricity through a substance.