Gum swells up in the water due to

Options

A. Imbibition
B. Diffusion
C. Endosmosis
D. Turgidity.

Answer

To solve the question "Gum swells up in the water due to," we need to analyze the options provided and understand the processes involved in the absorption of water by substances like gum.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks why gum swells when placed in water. This indicates a process of water absorption.

2. **Reviewing the Options**:
- **a. Imbibation**: This is the process where a solid substance absorbs water without dissolving. It leads to an increase in volume.
- **b. Diffusion**: This is the movement of molecules from an area of higher concentration to an area of lower concentration. While it involves movement, it does not specifically relate to the swelling of solids.
- **c. Endosmosis**: This refers to the movement of water into a cell through a semipermeable membrane, which is more relevant to cellular processes rather than solid substances like gum.
- **d. Turgidity**: This is the state of being swollen or firm due to the absorption of water, but it is more commonly used in the context of plant cells rather than solid substances.

3. **Identifying the Correct Process**: Among the options, imbibation is the most relevant process for the swelling of gum. When gum is placed in water, it absorbs the water and increases in volume due to imbibation.

4. **Conclusion**: Therefore, the correct answer to the question is **option A: imbibation**.

### Final Answer:
The gum swells up in the water due to **imbibation**.

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