Azeotropy is the property of

Options

A. All the solutions
B. Non-ideal solutions
C. Gas in liquid solution
D. Ideal solutions

Answer

### Step-by-Step Solution:

1. **Understanding Azeotropy**: Azeotropy refers to a phenomenon where a mixture of two or more liquids has a constant boiling point and composition throughout the distillation process.

2. **Types of Solutions**: Solutions can be classified into two main categories:
- **Ideal Solutions**: These solutions obey Raoult's law at all concentrations and temperatures. The vapor pressure of each component is proportional to its mole fraction.
- **Non-Ideal Solutions**: These solutions do not follow Raoult's law and can show deviations (either positive or negative) from the expected behavior.

3. **Characteristics of Azeotropic Mixtures**:
- Azeotropic mixtures maintain a constant composition in both the liquid and vapor phases at a given temperature.
- They cannot be separated into their components by simple distillation or fractional distillation because the vapor produced has the same composition as the liquid mixture.

4. **Conclusion**: Since azeotropic mixtures are characterized by their constant composition and inability to be separated by fractional distillation, they are classified as **non-ideal solutions**.

5. **Final Answer**: Therefore, the correct answer to the question "Azeotropy is the property of" is **non-ideal solutions**.