The kinetic molecular theory is best illustrated by the statement that the properties of a state of matter is associated with the motion of its molecules.
Kinetic molecular theory:
According to the kinetic molecular theory, all the matter is formed of particles, which are in motion spontaneously. All the particles possess energy, however, the energy changes based upon the temperature of the sample of matter. This is further determined by the fact that whether the substance prevails in liquid, solid, or gaseous state.
In the solid phase, the molecules exhibit the least amount of energy, while the particles of gas exhibits the highest amount of energy. According to the kinetic molecular theory, all the particles of gas are in spontaneous motion and exhibit perfectly elastic collisions.
Thus, the correct statement is option A.
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