An Azeotropic mixture of two miscible liquids boils at a lower temperature than its components when:

Explanation

An azeotropic mixture is a combination of liquids that behave as a single substance with a consistent boiling point and consistent vapor and liquid phase compositions at a given pressure. When a system shows a positive deviation from Raoult's law, the intermolecular forces between different components are weaker compared to those in an ideal solution. This results in a lower boiling point as the total vapor pressure is higher than predicted by Raoult's law. Hence, the azeotropic mixture boils at a lower temperature than any of its pure components. In contrast, a negative deviation would indicate stronger intermolecular forces, leading to a higher boiling point.Therefore, Option B is correct because it describes the situation where a positive deviation results in a lower boiling point for the azeotropic mixture.