Process of solid camphor into camphor vapour is called:

Explanation

The process of converting solid camphor into vapour is defined as sublimation. Some solids, when heated, do not change into the liquid state; instead, they directly change into vapour, and on cooling, the vapour directly changes back into solid. Such substances are called sublimates, and the process is called sublimation. By this method, substances like camphor, naphthalene, ammonium chloride, etc. are purified.