Sublimation

Question

Which mixture can be separated by sublimation?

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1. **Sublimation**: The process where a solid changes directly into vapor on heating without passing through the liquid state.
2. **Principle**: This method is used to separate a **sublimable** solid from a **non-sublimable** impurity.
3. **Substances**: Common sublimable organic/inorganic substances include Camphor, Naphthalene, Iodine, Benzoic acid, and **Ammonium Chloride ($NH_4Cl$)**.
4. **Application**: In a mixture of $NH_4Cl$ and $NaCl$ (Common salt), $NH_4Cl$ will sublime and can be collected on a cold surface, while $NaCl$ remains as a residue.
5. **Note**: Sugar, $KCl$, and $NaCl$ do not sublime; Toluene and Benzene are liquids.

Sublimation

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