A colloidal system having a solid substance as a dispersed phase and a liquid as a dispersion medium is classified as …….

Options

A. solid sol
B. gel
C. emulsion
D. sol

Explanation

To solve the question regarding the classification of a colloidal system with a solid substance as a dispersed phase and a liquid as a dispersion medium, we can follow these steps:

### Step 1: Understand the Components of a Colloidal System
A colloidal system consists of two main components:
- **Dispersed Phase**: The substance that is distributed throughout the medium (in this case, a solid).
- **Dispersion Medium**: The substance in which the dispersed phase is distributed (in this case, a liquid).

### Step 2: Identify the Types of Colloids
There are various types of colloidal systems based on the state of the dispersed phase and the dispersion medium:
1. **Solid Sol**: Solid dispersed in a solid medium.
2. **Gel**: Liquid dispersed in a solid medium.
3. **Emulsion**: Liquid dispersed in a liquid medium.
4. **Sol**: Solid dispersed in a liquid medium.

### Step 3: Analyze the Given Information
In the question, we have:
- Dispersed Phase: Solid
- Dispersion Medium: Liquid

### Step 4: Match with the Types of Colloids
From the types listed:
- **Solid Sol** does not match because both phases are solid.
- **Gel** does not match because the dispersed phase is liquid.
- **Emulsion** does not match because both phases are liquid.
- **Sol** matches perfectly as it refers to a solid dispersed in a liquid.

### Step 5: Conclusion
Based on the analysis, the correct classification for a colloidal system with a solid substance as a dispersed phase and a liquid as a dispersion medium is a **Sol**.

### Final Answer
The colloidal system is classified as a **Sol**.

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