Identify the wrong statement among the following:

Options

A. Molecules of solids possess only vibratory motion.
B. Solids are incompressible.
C. Solids have only one free surface.
D. Gases are highly diffusible.

Explanation

To solve the question of identifying the wrong statement among the provided options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Examine the First Statement: "Molecules of solid possess only vibratory motion."**
- **Analysis:** This statement is correct. In solids, molecules are closely packed and can only vibrate in their fixed positions due to strong intermolecular forces. They do not have enough energy to move freely.
- **Conclusion:** This statement is true.

2. **Examine the Second Statement: "Solids are incompressible."**
- **Analysis:** This statement is also correct. Solids have tightly packed particles, which makes them incompressible under normal conditions. They resist changes in volume.
- **Conclusion:** This statement is true.

3. **Examine the Third Statement: "Solids have only one free surface."**
- **Analysis:** This statement is incorrect. Solids can have multiple surfaces. For example, if a solid object is broken, it creates new surfaces. Solids consist of many layers of atoms, and each layer can contribute to multiple surfaces.
- **Conclusion:** This statement is false.

4. **Examine the Fourth Statement: "Gases are highly diffusible."**
- **Analysis:** This statement is correct. Gases have weak intermolecular forces, allowing them to spread out and mix easily with other gases, which is known as diffusion.
- **Conclusion:** This statement is true.

### Final Conclusion:
- The wrong statement among the options provided is: **"Solids have only one free surface."**