1. Tardigrade
  2. Question
  3. Chemistry
  4. Glycerol boils at 290oC with slight decomposition. Which of the following method is used to purify impure glycerine?

Q. Glycerol boils at with slight decomposition. Which of the following method is used to purify impure glycerine?

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Solution:

The liquids which decompose at its boiling point can be purified by vacuum distillation. Glycerol which decomposes at its boiling point (563 K) can be distilled without decomposition at 453 K under 12 mm Hg pressure.