Dry wooden pieces fixed in the crevices of a rock and soaked with water split the rock. The pressure responsible for this is

Options

A. Osmotic pressure
B. Turgor pressure
C. Wall pressure
D. Imbibitional pressure

Answer

To solve the question regarding the pressure responsible for dry wooden pieces fixed in the crevices of a rock and soaked with water that splits the rock, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Imbibition**:
- Imbibition is the process where water is absorbed by solids, such as wood, causing them to swell. This process occurs when dry wooden pieces are placed in a moist environment.

2. **Application of Imbibition to the Scenario**:
- In the given scenario, dry wooden pieces are fixed in the crevices of a rock. When these wooden pieces absorb water from their surroundings, they undergo imbibition.

3. **Pressure Development**:
- As the wooden pieces absorb water, they swell due to the imbibitional process. This swelling generates pressure within the wooden pieces.

4. **Effect of Pressure on Rock**:
- The pressure created by the swelling wooden pieces is significant enough to exert force on the surrounding rock. This pressure can lead to the splitting of the rock.

5. **Identifying the Type of Pressure**:
- The pressure responsible for splitting the rock in this scenario is known as imbibitional pressure, which is specifically related to the absorption of water by solid materials.

6. **Conclusion**:
- Therefore, the correct answer to the question is **imbibitional pressure**.

### Final Answer:
The pressure responsible for the splitting of the rock due to dry wooden pieces soaked with water is **imbibitional pressure**.

---