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Glycerol boils at `290^(@)` C slight decomposition Impure glycerine can be purified by

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Glycerol boils at `290^(@)` C slight decomposition Impure glycerine can be purified by
A. Steam distillation
B. Simple distillation
C. Vacuum distillation
D. Extraction with a solvent
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Correct Answer - C
The liquids which decompose at its boiling point can be purified by vacuum distillation . Glycerol which decomposes at its boiling point (-563K) can be distilled without decomposition at 453 K under 12 mm Hg pressure.
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