Fog is an example of a colloid system of:

Options

A. liquid particles dispersed in gas
B. gas particles dispersed in gas
C. solid particles dispersed in gas
D. solid particles dispersed in liquid

Answer

To solve the question regarding fog as an example of a colloid system, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Colloids**: A colloid is a mixture where one substance (the dispersed phase) is distributed evenly throughout another substance (the continuous phase). Colloids can be classified based on the states of the dispersed phase and the continuous phase.

2. **Identifying the Components of Fog**: Fog is a collection of tiny water droplets suspended in the air. Here, the water droplets are the dispersed phase, and the air acts as the continuous phase.

3. **Classifying the Colloid**: Since the dispersed phase (water droplets) is in a liquid state and the continuous phase (air) is in a gaseous state, we can classify fog as a type of colloid.

4. **Selecting the Correct Option**: Based on the classification:
- Option 1: Liquid particles dispersed in gas (this matches fog).
- Option 2: Gas particles dispersed in gas (not applicable).
- Option 3: Solid particles dispersed in gas (not applicable).
- Option 4: Solid particles dispersed in liquid (not applicable).

The correct option is option 1: liquid particles dispersed in gas.

### Final Answer:
Fog is an example of a colloid system of **liquid particles dispersed in gas** (Option 1).

---