Which of the following amounts to repeated distillations?

Options

A. Vacuum distillation
B. Steam distillation
C. Fractional distillation
D. Simple distillation

Answer

C

Explanation

A fractionating column increases the cooling surface and the vapors go up from the distillation flask through the column. The higher boiling liquids are condensed in the lower portions of the column. As the lower portion of the column is hotter than the upper portion, the more volatile components will volatilize and condense in the upper, cooler portion of the column.