JAMB Physics 1978 Question 16

Question 16

Structure of Matter and Kinetic Theory

A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undisturbed. Eventually all the water tasted salty. This action is due to

  1. A.convection
  2. B.osmosis
  3. C.capillarity
  4. D.diffusion
  5. E.conductivity
Show the answer and explanation

Answer: D (diffusion)

Explanation

The dissolved salt particles spread out on their own from where they are concentrated to the rest of the water by random motion. This is diffusion.