Question

Explain sublimation of iodine in detail.

Answer 1

Sublimation of iodine:
Iodine is one of the solid which on heating vaporize without melting. And, on cooling, the vapours change directly back into the solids without going through liquid state. Such a change in the state of a solid is called sublimation.
The solid obtained as a result of sublimation is called the sublimate.
Experiment to show sublimation-
Take some iodine in a porcelain dish and cover it with an inverted conical funnel.
A test tube is inverted on the stem of funnel.
The basin is now heated on a sand bath.
Iodine sublimes off as vapours and gets deposited on the cooler parts of the test tube.