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Answer the following question in a few sentences:
 
Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.
 
A fractionating column makes the method of fractional  more efficient than simple distillation by providing increased possibilities for of the liquid. A fractionating column packed with glass beads or glass helices provides a for the vapours to collide and so that they can be condensed and distilled quickly. the length of the fractionating column would also increase the efficiency of fractional distillation.