Surya and Chandra are given two mixtures i) common salt in water ii) Ammonium chloride in water respectively and asked them to separate the components by evaporation, they tried to separate by evaporation. It is possible for Surya, but not for Chandra. because

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It is not possible because common salt is sublimable where as ammonium chloride is not

Evaporation is employed only when solid is non volatile

Evaporation is employed only when solid is volatile

All the above

answer is A.

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Detailed Solution

Common salt is a non-volatile solute which dissolves in water. On evaporation water gets evaporated, common salt left in the watch glass. But in case of volatile ammonium chloride it is easily undergoes sublimation on heating. Hence, Surya only separated the mixture.

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