Question

Water potential of a solution is depicted by

• A. 𝜳p
• B. 𝜳w
• C. 𝜳s
• D. all of the above

Answer 1

The correct option is B 𝜳w

Water potential is the difference in chemical potential of water in a system over its pure state at the same temperature and pressure. The water potential of pure water is zero and that of the solution will be a negative value. Water potential is represented by the sign 𝜳w.

𝜳s (solute potential or osmotic potential) is the magnitude of decrease of water potential with respect to that of pure water due to the dissolution of solute.

𝜳p (pressure potential also called as turgor pressure or turgor potential) is the pressure exerted by the swelling protoplast on its walls due to the osmotic entry of water into it.