Explanation:

Azeotrope is a mixture of two or more liquids that boils at a constant temperature and composition. A minimum-boiling azeotrope is a type of azeotrope where the boiling point of the mixture is lower than the boiling point of any of its components. In a minimum-boiling azeotrope, the vapor produced during boiling has the same composition as the liquid mixture.

Let's analyze each option to determine which one is not a minimum-boiling azeotrope:

a) Ethanol-water: This is a minimum-boiling azeotrope with a boiling point of 78.15 °C at a composition of 95.6% ethanol and 4.4% water. The boiling point of pure ethanol is 78.3 °C and the boiling point of pure water is 100 °C. Therefore, the boiling point of the mixture is lower than the boiling point of either component.

b) Carbon disulphide-acetone: This is also a minimum-boiling azeotrope with a boiling point of 46.5 °C at a composition of 87.5% carbon disulphide and 12.5% acetone. The boiling point of pure carbon disulphide is 46.3 °C and the boiling point of pure acetone is 56.2 °C. Thus, the boiling point of the mixture is lower than the boiling point of either component.

c) Benzene-water: This is a minimum-boiling azeotrope with a boiling point of 69.3 °C at a composition of 91.7% benzene and 8.3% water. The boiling point of pure benzene is 80.1 °C and the boiling point of pure water is 100 °C. Therefore, the boiling point of the mixture is lower than the boiling point of either component.

d) Hydrochloric acid-water: This is not a minimum-boiling azeotrope as the boiling point of the mixture is higher than the boiling point of either component. The boiling point of pure hydrochloric acid is -85 °C, and the boiling point of pure water is 100 °C. When mixed, the boiling point of the mixture increases due to the strong hydrogen bonding between the two components. Thus, this is not a minimum-boiling azeotrope.

In conclusion, option D, Hydrochloric acid-water, is not a minimum-boiling azeotrope.

A maximum-boiling azeotrope occurs when the negative deviations are very large and the total pressure curve passes through a minimum.