which of the following represents a multimolecular colloidal paricles?

Options

A. Starch
B. A sol of gold
C. Proteins
D. Soaps

Answer

To determine which of the given options represents multimolecular colloidal particles, we need to understand the definition and characteristics of multimolecular colloids.

### Step-by-Step Solution:

1. **Understanding Multimolecular Colloids**:
- Multimolecular colloids are formed when a large number of small molecules or atoms aggregate together in a dispersion medium. These aggregates fall within the size range of colloidal particles, which is typically between 1 nm and 1000 nm.

2. **Analyzing the Options**:
- We have four options to evaluate: A (Starch), B (Solution of Colloidal Gold), C (Proteins), and D (Soaps).

3. **Option A - Starch**:
- Starch is a polysaccharide and is classified as a lyophilic colloid (water-loving). It does not break into ions but forms a colloidal solution. However, it consists of large molecules rather than aggregates of smaller molecules, so it does not qualify as a multimolecular colloid.

4. **Option B - Solution of Colloidal Gold**:
- Colloidal gold consists of small gold particles that are dispersed in a medium. This is a classic example of a lyophobic colloid (water-hating) and is formed from the aggregation of many gold atoms. Therefore, this option represents multimolecular colloidal particles.

5. **Option C - Proteins**:
- Proteins are also lyophilic colloids and consist of large macromolecules. They do not form aggregates of smaller molecules, so they do not qualify as multimolecular colloids.

6. **Option D - Soaps**:
- Soaps can form micelles in solution, which are also considered lyophilic colloids. Like proteins, they consist of larger molecules and do not represent multimolecular colloidal particles.

7. **Conclusion**:
- Based on the analysis, the correct option that represents multimolecular colloidal particles is **Option B (Solution of Colloidal Gold)**.

### Final Answer:
**Option B (Solution of Colloidal Gold)** represents multimolecular colloidal particles.