Question

explain principle of sublimation

Answer 1

Sublimation is a process in which a solid turns directly into gas without passing into liquid state. The solids having very weak intermolecular forces have a higher vapour pressure than usual due to which these solids pass directly into vapour Sublimation is used by chemists for purification of compounds. 
It is also used in forensic science.
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Answer 2

Sublimation is the process in which a SOLID  directly changes its state to GASEOUS STATE without changing itself into LIQUID form.

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