Write the principle behind the sublimation separation technique. Give a few examples of mixtures where sublimation can be used as separation technique.

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Solution

Sublimation is used for the separation of a solid-solid mixture where one of the components sublimes (converts from solid state to gaseous state without forming liquid) upon heating, leaving behind the other components that are non-sublimable.

Examples of mixtures where sublimation can be used as separation technique:

Sand and mothball mixture

Camphor powder and common salt

Ammonium chloride and chalk powder

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