The gel-sol transformation on mechanical shaking and allowing to stand is called……….

Explanation

**Step-by-Step Solution:**

1. **Understanding Gel and Sol:**
- A gel is a colloidal system where a liquid is dispersed in a solid. It has a semi-solid structure.
- A sol is a colloidal system where solid particles are dispersed in a liquid. It has a fluid-like consistency.

2. **Identifying the Transformation:**
- The transformation from gel to sol occurs when mechanical shaking is applied. This shaking disrupts the structure of the gel, allowing it to flow like a sol.
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