Final answer:
The correct answer is Flask, which is part of a distillation setup allowing vapors to move to a condenser, where they are cooled and collected as a purified substance.
Step-by-step explanation:
The subject of the question pertains to equipment used in the process of distillation. The correct answer is Flask. A flask is a type of laboratory glassware with a round body that may include a lateral tube, which is essential for the process of distillation. It allows vapors to travel from the heated liquid to a condenser, where they are cooled and revert to liquid form. In a typical distillation setup, a Bunsen burner heats the distilling flask containing the solution. As the solution boils, vapor rises into the condenser, which is continuously cooled by water running through it. The pure substance then collects in a receiving flask. Distillation columns are utilized in industrial processes, such as the fractional distillation of crude oil, where different components condense at various heights along the column based on their boiling points.