Glycerin can be purified by:

vacuum distillation

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simple distillation

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steam distillation

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fractional distillation

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Solution

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

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Similar questions

Name the metal which can be purified by distillation process ?

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

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