Chemistry 5070 · O Level · Separation and purification

Separation and purification — practice question

Benzene and cyclohexane are both flammable liquids. They can be blended together without forming separate layers. Their boiling points are very close to one another. Because of this, a mixture of these two liquids is hard to separate by fractional distillation. Why is it hard to separate a mixture of benzene and cyclohexane by fractional distillation?

  • AThey are both flammable.
  • BThey are both liquids.
  • CThey have very similar boiling points.
  • DThey mix with each other completely.

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