The colloidal system consisting of a liquid adsorbent and a gas adsorbate is termed as

Options

A. Aerosol
B. Liquid aerosol
C. Foam
D. Gel

Answer

To solve the question, we need to identify the correct term for a colloidal system consisting of a liquid adsorbent (dispersion medium) and a gas adsorbate (dispersed phase).

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Dispersion Medium**: This is the phase in which the particles are dispersed. In this case, it is a liquid.
- **Dispersed Phase**: This is the phase that is dispersed in the medium. Here, it is a gas.

2. **Identify the Colloidal System**:
- We are looking for a colloidal system where the dispersion medium is a liquid and the dispersed phase is a gas.

3. **Analyze the Options**:
- **Option 1: Aerosol**: In an aerosol, the dispersed phase is solid and the dispersion medium is gas. This does not match our requirement.
- **Option 2: Liquid Aerosol**: In a liquid aerosol, the dispersed phase is liquid and the dispersion medium is gas. This also does not match our requirement.
- **Option 3: Foam**: In foam, the dispersed phase is gas and the dispersion medium is liquid. This matches our requirement perfectly.
- **Option 4: Gel**: In a gel, the dispersed phase is liquid and the dispersion medium is solid. This does not match our requirement.

4. **Conclusion**:
- The correct term for a colloidal system consisting of a liquid adsorbent and a gas adsorbate is **Foam**.

### Final Answer:
The colloidal system consisting of a liquid adsorbent and a gas adsorbate is termed as **Foam**.