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Q.

Glycerol can be separated from spent-lye in the soap industry by?


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a

Crystallization   

b

Sublimation   

c

Distillation under reduced pressure   

d

Chromatography 

answer is C.

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Detailed Solution

●        In the soap industry, glycerol (B.P. 290°C) is extracted from used lye via distillation under decreased pressure because simple distillation requires a very high temperature that could disintegrate the component.
●        In the soap industry, glycerol can be extracted from spent lye using reduced pressure distillation.
  
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Glycerol can be separated from spent-lye in the soap industry by?