All colloidal solutions show :

Options

A. Very high osmotic pressure
B. High omotic pressure
C. Low osmotic pressure
D. No osmotic pressure

Answer

To solve the question "All colloidal solutions show:", we will analyze the properties of colloidal solutions and determine the correct option based on those properties.

### Step-by-Step Solution:

1. **Understanding Colloidal Solutions**:
- Colloidal solutions consist of tiny particles (colloids) that are dispersed in a continuous medium (usually a liquid). These particles are larger than molecules but smaller than particles in a suspension.

2. **Properties of Colloidal Solutions**:
- Colloidal solutions exhibit certain unique properties:
- They do not settle out upon standing (unlike suspensions).
- They cannot be separated by ordinary filtration (unlike solutions).
- They scatter light (Tyndall effect).
- They have low osmotic pressure compared to true solutions.

3. **Analyzing the Options**:
- We need to evaluate the options provided (A, B, C, D) based on the properties mentioned above.
- Since the video transcript indicates that colloidal solutions are neither true solutions nor suspensions and have low osmotic pressure, we focus on these characteristics.

4. **Identifying the Correct Option**:
- Based on the properties discussed, the correct option that reflects the nature of colloidal solutions is option C, which states that colloidal solutions have low osmotic pressure and are neither solutions nor suspensions.

5. **Conclusion**:
- Therefore, the answer to the question "All colloidal solutions show:" is option C.

### Final Answer:
**Option C is correct.**