Which is wrong

Options

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

Answer

To determine which statement is wrong among the given options, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement 1: Water potential is the chemical potential of water.**
- Water potential is indeed defined as the chemical potential of water, which is the free energy per mole of water. It reflects the tendency of water to move from one area to another and is influenced by the number of water molecules in the system.
- **Conclusion:** This statement is **correct**.

2. **Statement 2: Solute potential is always negative.**
- Solute potential (Ψs) is a measure of the effect of solute concentration on the overall water potential. It is always negative because the addition of solute lowers the water potential.
- **Conclusion:** This statement is **correct**.

3. **Statement 3: Pressure potential is zero in the flaccid cell.**
- In a flaccid cell, the cell is not turgid, meaning there is no pressure being exerted by the cell contents against the cell wall. Therefore, the pressure potential (Ψp) is indeed zero in a flaccid cell.
- **Conclusion:** This statement is **correct**.

4. **Statement 4: Water potential is equal to the solute potential in the fully turgid cell.**
- In a fully turgid cell, the water potential (Ψ) is equal to the sum of solute potential (Ψs) and pressure potential (Ψp). In this case, the pressure potential is positive, and the solute potential is negative. Therefore, water potential cannot be equal to solute potential alone; it is actually equal to the sum of both.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion:
The wrong statement among the options is **Statement 4: Water potential is equal to the solute potential in the fully turgid cell**.

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