Imbibition is a type of

Options

A. Osmosis
B. Active transport
C. Bulk flow
D. Diffusion

Answer

**Step-by-Step Solution:**

1. **Understanding Imbibition**: Imbibition is a process where water is absorbed by solids or colloids. This absorption leads to an increase in the volume of the substance.

2. **Type of Process**: Imbibition is characterized as a special type of diffusion. In diffusion, substances move from an area of higher concentration to an area of lower concentration. Similarly, in imbibition, water moves into the solids or colloids.

3. **Concentration Gradient**: The process of imbibition occurs along the concentration gradient, meaning that water moves from an area of higher water concentration (the surrounding environment) to an area of lower water concentration (the solid or colloid).

4. **Affinity Factor**: The effectiveness of imbibition depends on the affinity between the adsorbent (the solid or colloid) and the liquid being absorbed (water in this case). A higher affinity results in more efficient imbibition.

5. **Examples of Imbibition**: Common examples include the germination of seeds, where seeds absorb water to swell and begin the germination process, and the absorption of water by dry wood.

6. **Conclusion**: Based on the understanding that imbibition is a special type of diffusion, the correct answer to the question is "diffusion."

**Final Answer**: Imbibition is a type of diffusion.

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