Question

Which of the following method is used to purify a liquid that decomposes at its boiling point?

• A. Crystallisation
• B. Differential extraction
• C. Fractional distillation
• D. Distillation under reduced pressure

Answer 1

Answer:

D. Distillation under reduced pressure

Distillation under reduced pressure, also known as vacuum distillation, is a method used to purify liquids that are sensitive to heat or decompose at their boiling point. By reducing the pressure, the boiling point of the liquid is lowered, allowing for purification without decomposition.