The solution which boil at constant temperature like a pure liquid and possess same composition in liquid as well as vapour state are called azeotropes. The components of azetropes cannot be separated by fractional distillation. Only non-ideal solutions form azeotropes. Solutions with negative deviation form maximum boiling azeotrope and the solutions with positive deviation form minimum boiling azeotrope. The boiling point of an azeotrope is never equal to the boiling points of any of the components of the azeotrope.
Answer the following question:
The azeotropic solutions of two miscible liquids
The azeotropic mixture of water and `HCl` boils at `108.5^(@)C`. This solution is

Options

A. Ideal
B. Non-ideal with positive deviation
C. Non-ideal with negative deviation
D. None

Explanation

To solve the question regarding the azeotropic mixture of water and HCl, we will follow these steps:

### Step 1: Understand the Concept of Azeotropes
Azeotropes are mixtures of two or more liquids that boil at a constant temperature and have the same composition in both the liquid and vapor phases. This means that when an azeotropic mixture is boiled, the vapor produced has the same composition as the liquid.

**Hint:** Azeotropes behave like pure substances during boiling.

### Step 2: Identify the Nature of the Azeotropic Mixture
The problem states that the azeotropic mixture of water and HCl boils at 108.5°C. To determine the nature of this azeotropic solution, we need to consider the interactions between the components.

**Hint:** Consider how the components interact with each other when mixed.

### Step 3: Determine the Type of Deviation
In this case, water and HCl are miscible and form strong hydrogen bonds. This interaction leads to a negative deviation from Raoult's law, meaning that the boiling point of the mixture is higher than that of the individual components.

**Hint:** Negative deviation occurs when the intermolecular forces in the mixture are stronger than those in the pure components.

### Step 4: Conclude the Type of Solution
Since the azeotropic mixture of water and HCl shows a negative deviation, it is classified as a non-ideal solution. The boiling point of the azeotropic mixture (108.5°C) is higher than the boiling point of pure water (100°C) and HCl (which is around -85°C for the pure compound).

**Hint:** Non-ideal solutions can exhibit either positive or negative deviations based on the interactions between the components.

### Final Answer
The azeotropic mixture of water and HCl boils at 108.5°C, and this solution is a **non-ideal solution with negative deviation**.