Question

Which of the following statements is correct regarding diffusion?

• A. Diffusion takes place only in gases.
• B. Movement of substances takes place from low concentration to high concentration.
• C. Movement of substances takes place from high concentration to low concentration.
• D. Diffusion takes place only in liquids

Answer 1

The correct option is C

Movement of substances takes place from high concentration to low concentration.

Diffusion is the spontaneous movement of a substance from a region of high concentration to a region of low concentration. It takes place in gases as well as liquids. Solids can only diffuse when they are in solution. Movement of substances across small distances in a cell takes place through diffusion.