Explain distillation and fractional distillation; when would you choose each?

• A. Distillation separates liquids by boiling point difference and requires a fractionating column in all cases.
• B. Fractional distillation is used for equimolar mixing with no energy control.
• C. Distillation cannot separate liquids with similar boiling points.
• D. Distillation separates liquids by boiling point difference; fractional distillation uses a fractionating column to improve separation for close-boiling components.

Answer: (D)