Q1: The apex of an equilateral-triangular coordinate (in ternary liquid system) represents a/an

ANS:A - pure component

A pure component in the context of a ternary liquid system refers to a substance that consists of only one chemical compound or species without any impurities or other substances mixed in. In a ternary system, there are three pure components, each representing one of the substances that make up the system. For example, consider a ternary liquid system composed of three substances: A, B, and C. Each of these substances is a pure component. At the apex of the equilateral triangular coordinate system used to represent this ternary system, one pure component is represented. Moving away from the apex towards the edges of the triangle, the compositions change, representing mixtures of two or more pure components. In summary, a pure component is a substance that is chemically homogeneous and consists of only one chemical compound or species, without any other substances mixed in. In a ternary liquid system, there are three pure components, each representing one of the substances present in the system.