Question

Which one of the following statements is wrong ?

• A. Water potential is the chemical potential of the water
• B. Solute potential is always negative
• C. Pressure potential is zero in a flaccid cell
• D. Water potential equals solute potential in a fully turgid cell

Answer 1

Answer: (D)

Water potential equals solute potential in a fully turgid cell

Answer 2

Water potential is the difference in the free energy or chemical potential per unit molal volume of water in a system and that of pure water at the same temperature and pressure. It is represented by greek letter $\Psi$ (psi) or more accurately $\Psi_{w}$ Water potential or $\Psi_{w}$ is the sum total of $\Psi_{s} \, and \, \Psi_{p}$ . $\Psi_{w \, }= \, \Psi_{s \, }+ \, \Psi_{p}$ where $\Psi_{s} \rightarrow$ solute potential $\Psi_{p} \rightarrow$ pressure potential