question_answer

Naphthalene is the simplest poly cyclic aromatic hydrocarbon. Naphthalene and NaCl both are crystalline solids but naphthalene has a characteristic odour that is detectable at concentration as low as 0.08 ppm by mass. Mixture of naphthalene and sodium chloride can easily be separated by

A)  fractional distillation      

B)  steam distillation      

C)  crystallisation               

D)  sublimation

Correct Answer: D

Solution :

During sublimation naphthalene sublime but sodium chloride remain undisturbed.