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 classify a colloidal system that has a solid substance as a dispersed phase and a liquid as a dispersion medium, we can follow these steps:

### Step 1: Understand the Definitions
- **Dispersed Phase**: The substance that is distributed throughout another substance.
- **Dispersion Medium**: The substance in which the dispersed phase is distributed.

### Step 2: Identify the Given Colloidal System
In the question, we have:
- **Dispersed Phase**: Solid substance
- **Dispersion Medium**: Liquid

### Step 3: Analyze the Options
1. **Solid Salt**: This refers to a solid in a solid matrix, which does not match our system.
2. **Gel**: This is a colloidal system where a liquid is dispersed in a solid, which is not our case.
3. **Emulsion**: This refers to a colloidal system where a liquid is dispersed in another liquid, which again does not match our system.
4. **Sol**: This refers to a colloidal system where a solid is dispersed in a liquid. This matches our system.

### Step 4: Conclusion
Based on the analysis, the correct classification for a colloidal system with a solid dispersed phase and a liquid dispersion medium is **Sol**.

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

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