Alcohols Phenols And Ethers Question 139
Question: Glycerol boils at $ 290^{o}C $ with slight decomposition. Impure glycerin can be purified by
[CPMT 1983, 94]
Options:
A) Steam distillation
B) Simple distillation
C) Vacuum distillation
D) Extraction with a solvent
Show Answer
Answer:
Correct Answer: C
Solution:
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 453K under 12mm Hg pressure.
BETA
