The term azeotrope refers to which of the following?

The term azeotrope refers to which of the following?

• A. A mixture of two volatile anesthetics
• B. A mixture of a volatile anesthetic plus N2O
• C. A mixture of volatile anesthetic plus N2
• D. Radioactively labeled N2O

Answer: (A)

An azeotrope is a mixture of two volatile liquids that boils at a fixed temperature and, at that point, the vapor has the same composition as the liquid. In other words, the mixture behaves like a single substance and cannot be separated into its components by ordinary distillation—the ratio of the components stays the same in both liquid and vapor phases. In the context of volatile anesthetics, this means that when two volatile anesthetics form an azeotrope, their combined vapor is released in a fixed proportion that cannot be altered by simple vaporization. The other options describe mixing with nitrogen, oxygen, or nitrous oxide, or a radioactive label, which do not define an azeotrope.

An azeotrope is a mixture of two volatile liquids that boils at a fixed temperature and, at that point, the vapor has the same composition as the liquid. In other words, the mixture behaves like a single substance and cannot be separated into its components by ordinary distillation—the ratio of the components stays the same in both liquid and vapor phases. In the context of volatile anesthetics, this means that when two volatile anesthetics form an azeotrope, their combined vapor is released in a fixed proportion that cannot be altered by simple vaporization. The other options describe mixing with nitrogen, oxygen, or nitrous oxide, or a radioactive label, which do not define an azeotrope.