JAMB Physics 1998 Question 23

Question 23

Structure of Matter and Kinetic Theory

One valid assumption of the kinetic theory of gases is that

  1. A.the molecules of a gas and constantly in state of motion and the number of collisions remain constant
  2. B.the number of molecules of gas increases with increasing pressure
  3. C.as the temperature increases, the number of collisions made by the gas molecules remain constant
  4. D.the molecules of gas are all identical and are very small in size
Show the answer and explanation

Answer: D (the molecules of gas are all identical and are very small in size)

Explanation

Kinetic theory assumes a gas is made of identical molecules that are tiny compared with the distances between them.