Question

By which method can ammonium chloride be separated from sand?

• A. By hand picking
• B. By filtration
• C. By sublimation
• D. By diffusion

Answer 1

The correct option is C By sublimation

Sublimation is used to separate a mixture of sand and ammonium chloride. Sublimation is a separation process that entails heating a mixture of solids, where one of the solids transitions from solid to gas without passing through the liquid state. The vaporized solid is then reclaimed by cooling the vapor which reverts back to its initial solid state.

In the case of ammonium chloride and sand, ammonium chloride is the sublimate and changes to vapor