At a refinery, petroleum is separated into several components by a process called fractional distillation using a fractionating column.
Which of the following statements is correct about the fractional distillation of petroleum?

Options

A. At each level in the column, only one compound is collected.
B. Temperature increases from bottom to top of the column.
C. The fractions collected at the top of the column are less volatile.
D. The fraction with the highest boiling point condenses first and gets collected near the base of the fractionating tower.

Answer

D