If two liquids A and B from minimum boiling azeotrope at some specific composition then

Options

A. A-B interactions are stringer then those A-A or B-B
B. vapour pressure of solution increases because more number of molecules of liquids A and B can escape from the solution
C. vapour pressure of solution decreases because less number of molecules of only one of the liquids escape from the solution
D. A-B interactions are weaker than those between A-A or B-B

Explanation

To solve the question regarding the minimum boiling azeotrope formed by two liquids A and B, let's break down the concepts step by step.

### Step-by-Step Solution:

1. **Understanding Azeotropes**:
- Azeotropes are mixtures of two or more liquids that boil at a constant temperature and maintain the same composition in both the liquid and vapor phases.
- A minimum boiling azeotrope occurs when the boiling point of the mixture is lower than that of either pure component.

**Hint**: Remember that azeotropes can be classified into minimum boiling and maximum boiling types based on their boiling points relative to the pure components.

2. **Interactions in the Mixture**:
- When two liquids A and B are mixed, the interactions between the molecules change.
- In pure liquids, we have AA and BB interactions (interactions between like molecules). When mixed, we have AB interactions (interactions between unlike molecules).

**Hint**: Consider how the strength of interactions affects the boiling point of the mixture.

3. **Boiling Point and Interactions**:
- The boiling point of a liquid is directly related to the strength of intermolecular interactions. Stronger interactions result in a higher boiling point.
- Since the mixture of A and B forms a minimum boiling azeotrope, it indicates that the boiling point of the mixture is lower than that of the pure components.

**Hint**: Think about how weaker interactions would lead to a lower boiling point.

4. **Analyzing the Given Options**:
- **Option 1**: "AB interactions are stronger than that of AA, BB." - This is incorrect because the boiling point is lower, indicating weaker interactions.
- **Option 2**: "Vapor pressure of solution increases because more number of molecules of liquid A and B can escape from the solution." - This is incorrect as well; the vapor pressure increases due to weaker interactions allowing more molecules to escape.
- **Option 3**: "Vapor pressure of solution decreases because less number of only one of the liquids escape from the solution." - This is also incorrect; the vapor pressure increases in a minimum boiling azeotrope.
- **Option 4**: "AB interactions are weaker than those of between AA and BB." - This is correct; the formation of a minimum boiling azeotrope indicates that AB interactions are weaker.

**Hint**: Evaluate each option based on the relationship between boiling point, vapor pressure, and intermolecular interactions.

5. **Conclusion**:
- The correct answer is that AB interactions are weaker than those of AA and BB, which explains the formation of a minimum boiling azeotrope.

### Final Answer:
**The correct option is 4: AB interactions are weaker than those of between AA and BB.**