Question

On a two-component solid-liquid phase diagram, an isopleth indicates which of the following?

• A. A region where the composition of the system is constant
• B. An area above which only the liquid phase exists
• C. A region where the pressure is constant
• D. An area below which only the solid phase exists

Answer 1

The correct option is A A region where the composition of the system is constant

An isopleth is a line that can be drawn on a phase diagram. It indicates a region where the composition is constant.

In a two-component solid-liquid phase diagram, it is drawn vertically covering a range of temperature

Hence, the correct option is $\text{A}$