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Question

Which of the following statements is wrong?

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

The correct option is D Water potential equals solute potential in a fully turgid cell.

Water potential is the difference in free energy or chemical potential per unit molar volume of water in a system and that of pure water at the same temperature and pressure.

It is represented by the Greek letter Ψ (psi) or more accurately Ψ w.

Water potential or Ψ w is sum of total Ψ s + Ψ p

Ψ w = Ψ s + Ψ p

Where Ψ s → solute potential

Ψ p → pressure potential


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