Which of the following is not the correct difference between lyophobic and lyophilic sols ?

Options

A. `{:("Lyophobic sols","Lyophilic sols methods for preparation"),("Require special","Can be prepard by shaking with the solvent"):}`
B. `{:("Lyophobic sols","Lyophilic sols methods for preparation"),("Are reversible","Are irreversible"):}`
C. `{:("Lyophobic sols","Lyophilic sols methods for preparation"),("Easily coagulated by electrolytes","Cannot be easily"):}`
D. `{:("Lyophobic sols","Lyophilic sols methods for preparation"),("Are less stable","Are more stable"):}`

Explanation

To solve the question "Which of the following is not the correct difference between lyophobic and lyophilic sols?", we will analyze the differences between these two types of colloidal solutions step by step.

### Step 1: Understand the Definitions
- **Lyophobic Sols**: These are colloidal solutions that do not have an affinity for the dispersion medium (solvent). They require special methods for their preparation and are less stable.
- **Lyophilic Sols**: These are colloidal solutions that have an affinity for the dispersion medium. They can be easily prepared by simple methods such as shaking with the solvent and are more stable.

**Hint**: Start by recalling the basic definitions of lyophobic and lyophilic sols.

### Step 2: Analyze the Statements
1. **Statement 1**: "Lyophobic sols require special methods for preparation, while lyophilic sols can be prepared by simple shaking."
- **Analysis**: This statement is correct. Lyophobic sols do require special methods for their preparation, whereas lyophilic sols can be prepared easily.

**Hint**: Confirm whether the preparation methods for both types of sols are accurately described.

2. **Statement 2**: "Lyophobic sols are reversible."
- **Analysis**: This statement is incorrect. Lyophobic sols are irreversible because they cannot revert to their original state once coagulated. Lyophilic sols, on the other hand, are reversible.

**Hint**: Check the reversibility of the sols and identify which type is irreversible.

3. **Statement 3**: "Lyophobic sols are easily coagulated by electrolytes."
- **Analysis**: This statement is correct. Lyophobic sols are less stable and can be easily coagulated by the addition of electrolytes.

**Hint**: Consider the stability of the sols and how they respond to electrolytes.

4. **Statement 4**: "Lyophobic sols are less stable, while lyophilic sols are more stable."
- **Analysis**: This statement is also correct. Lyophobic sols are indeed less stable compared to lyophilic sols.

**Hint**: Reflect on the stability of both types of sols and their behavior in different conditions.

### Step 3: Conclusion
After analyzing all the statements, we find that:
- Statement 1 is correct.
- Statement 2 is incorrect (this is the answer to the question).
- Statement 3 is correct.
- Statement 4 is correct.

Thus, the statement that is **not** a correct difference between lyophobic and lyophilic sols is **Statement 2**.

### Final Answer
**The answer is Statement 2: "Lyophobic sols are reversible."**