A few grains of table salt were put in a cup of cold water, kept at constant temperature and left undistributed. Eventually all the water tested salty. This action is due to?
A. convection B. osmosis C. capillarity D. diffusion
Correct Answer: D
Explanation
Diffusion is the tendency of molecules to migrate and fill an empty space due to their random thermal motions.
In diffusion, the diffusing molecules move from the places where their concentration high to places where their concentration is low.
