1.

Glycerol boils at 290^(@) C slight decomposition Impure glycerine can be purifiedby

Answer»

Steam DISTILLATION
Simple distillation
Vacuum distillation
Extraction with a solvent

Solution :The liquids which decompose at its BOILING point can be purified by vacuum distillation . Glycerol which decomposes at its boilingpoint(-563K) can be distilled without DECOMPOSITION at 453 K under 12 mm Hg pressure.


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