Organic Chemistry Some Basic Principles and Techniques - Result Question 56
####62. The best method for the separation of naphthalene and benzoic acid from their mixture is
(a) distillation
(b) sublimation
(c) chromatography
(d) crystallisation
[2005]
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Solution:
- (b) Among the given compounds naphthalene is volatile but benzoic acid is non-volatile (it forms a dimer). So, the best method for their separation is sublimation
Sublimation method is applicable to compounds which can be converted directly into the vapour phase from its solid state on heating and back to the solid state on cooling.
