What type of colloidal system is fog?

Options

A. Gas in liquid
B. Liquid in gas
C. Liquid in liquid
D. Solid in gas

Explanation

To determine the type of colloidal system that fog represents, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Colloidal Systems**:
- Colloidal systems consist of two phases: a dispersed phase and a dispersion medium. The dispersed phase is the substance that is distributed throughout the other substance.

2. **Identify the Components of Fog**:
- Fog is a mixture that consists of tiny water droplets suspended in air. Here, the water droplets represent the dispersed phase, while the air serves as the dispersion medium.

3. **Classify the Type of Colloidal System**:
- Based on the components identified, we can classify fog. Since the dispersed phase (water droplets) is a liquid and the dispersion medium (air) is a gas, we can categorize fog as a "liquid in gas" colloidal system.

4. **Select the Correct Option**:
- From the options provided, the correct classification for fog is "liquid in gas."

### Final Answer:
Fog is a colloidal system classified as "liquid in gas."

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