which one of the following is lyophilic colloid ?

Options

A. Pt
B. Gum
C. Fog
D. Blood

Answer

To determine which of the following is a lyophilic colloid among Platinum, Gum, Fog, or Blood, we can follow these steps:

### Step 1: Understand the Definition of Lyophilic Colloids
Lyophilic colloids are colloidal systems where the dispersed phase has a strong affinity for the dispersion medium. These colloids are stable and can be easily separated from the dispersion medium through physical methods.

### Step 2: Identify the Options
We have four options to consider:
1. Platinum
2. Gum
3. Fog
4. Blood

### Step 3: Analyze Each Option
- **Platinum**: This is a metal and does not form a colloidal solution in a dispersion medium. It is not a lyophilic colloid.
- **Gum**: This is an organic substance that has a strong affinity for water and can form stable colloidal solutions. It is a classic example of a lyophilic colloid.
- **Fog**: This is an aerosol, which is a colloid of liquid droplets in air. It does not have a strong affinity for the dispersion medium (air) and is not considered lyophilic.
- **Blood**: While blood is a complex mixture that contains colloidal components, it is not classified as a lyophilic colloid in the same way as gum.

### Step 4: Conclusion
Based on the analysis, the only option that qualifies as a lyophilic colloid is **Gum**.

### Final Answer:
**Gum** is the lyophilic colloid among the given options.

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