Question -
A mixture of iodine and sand can be separated by the process of :
Options:
A .  distillation
B .  crystallisation
C .  sublimation
D .  chromatography
Answer: Option C : C Sublimationseparates a mixture of solids in which one solid undergoes sublimation. In other words, it changes directly to vapour on heating, without going through the liquid state. Iodine is a solid that sublimes. When a mixture of iodine and sand is heated in a beaker, the iodine changes from solid to vapour directly. These vapours of iodinecan be obtained by cooling. They will change back to solid directly.
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