Answer:
(i) Sublimation. Camphor sublimes
while common salt remains as residue in the china dish.
(ii) Since the two liquids are
immiscible, the technique of solvent extraction with a separating funnel is used.
The mixture is thoroughly shaken and the separating funnel is allowed to stand.
Kerosene being lighter than water forms the upper layer while water forms the
lower layer. The lower water layer is run off when kerosene oil is obtained. It
is dried over anhydrous \[CaC{{l}_{2}}\] or \[MgS{{O}_{4}}\] and then distilled
to give pure kerosene oil.
(iii) Distillation under reduced
pressure.
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