The emulsoid which is added to suspensoid to prevent flocculation is called………………..

Answer

To solve the question regarding the emulsoid that is added to a suspensoid to prevent flocculation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Emulsoid**: These are colloidal systems that are stable and typically lyophilic (solvent-attracting). They have a strong attraction between the dispersed phase and the dispersing medium.
- **Suspensoid**: These are colloidal systems that are unstable and typically lyophobic (solvent-hating). They do not have a strong attraction with the dispersing medium and can easily precipitate.

2. **Identify the Function of Emulsoids**:
- Emulsoids are used to stabilize suspensoids. When added to suspensoids, they help prevent flocculation (the process where particles clump together and settle out of the solution).

3. **Define Protective Colloids**:
- Emulsoids that are added to suspensoids to prevent their precipitation are known as protective colloids. They help maintain the stability of the suspensoid by preventing the particles from aggregating.

4. **Example of a Protective Colloid**:
- One of the most common examples of a protective colloid is gelatine. It is often used in various applications to stabilize suspensions.

5. **Conclude the Answer**:
- Therefore, the emulsoid which is added to a suspensoid to prevent flocculation is called a **protective colloid**.

### Final Answer:
The emulsoid which is added to suspensoid to prevent flocculation is called a **protective colloid**.