Which method is applied for purification of liquid which decompose before their boiling point?
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Vacuum distillation is used to purify a liquid which decomposes at or below its boiling point.In this method, the pressure over liquid is reduced by using a vacuum pump due to which the liquid boils at a temperature below its boiling point and thus decomposition of liquid is prevented.Example:Glycerol which decomposes at 563 K boils at 453 K at a pressure of 12mm.
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