A) sublimation
B) steam distillation
C) vacuum distillation
D) fractional distillation
Correct Answer: C
Solution :
Key Idea Sublimation Solid \[\] Vapour The compound which sublime on healing can be purified by this method. Example camphor naphthalene, \[N{{H}_{4}}Cl,\,{{I}_{2}}\] benzoic acid are purified by this method. Steam distillation Organic compounds which are volatile in steam can be purified by steam distillation. Example Nitrobenzene, aniline, essential oils etc. Vacuum distillation Organic liquids of high boiling point which decompose near their boiling point can be purified by this method. Example, glycerol. Fractional distillation This method is applicable for those liquids mixture, when the compound differ in their boiling point by 10 to\[{{15}^{o}}C\]. A liquid decomposes at its normal boiling point so it can be purified by vacuum distillation.
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