Value of water potential for pure water is :

Options

A. 1
B. 2
C. 3
D. zero

Answer

### Step-by-Step Solution:

1. **Understanding Water Potential**: Water potential is a measure of the potential energy in water and is an important factor in determining the movement of water in plants. It is influenced by solute concentration and pressure.

2. **Defining Pure Water**: Pure water is water that does not contain any solutes. This means it has the highest concentration of free water molecules.

3. **Kinetic Energy of Water Molecules**: The kinetic energy of water molecules is directly related to the number of free water molecules present. In pure water, since there are no solutes, the concentration of free water molecules is at its maximum.

4. **Effect of Solutes on Water Potential**: When solutes are added to water, they occupy space and reduce the number of free water molecules. This results in a decrease in the kinetic energy of the water molecules, which in turn lowers the water potential.

5. **Conclusion for Pure Water**: Since pure water has no solutes, it maintains the highest water potential possible, which is defined as 0. Therefore, the value of water potential for pure water is 0.

6. **Final Answer**: The value of water potential for pure water is **0**.