Impure glycerine can be purified by:

steam distillation

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vacuum distillation

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simple distillation

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extraction with a solvent

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Solution

The correct option is B vacuum distillation
Vaccum distillation is to purify liquids which have very high boiling points and those which decompose at or below their boiing points.
A water pump or vaccum pump is used to reduce the pressure. This method is used widely in the separation of glycerol from spent lye in soap industry.

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Similar questions

Glycerol boils at 290^oC with slight decomposition. Impure glycerine can be purified by[CPMT 1983, 94]

290^{\circ} C

290^{o} C

Glycerol boils at 290^oC with slight decomposition. Impure glycerine can be purified by[CPMT 1983, 94]

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