Question

Iodine melts on heating​

Answer 1

When Iodine crystals are heated, the van der waals are easily overcome and the molecule breaks into gas phase. They sublime and form a purple colored dense vapor. The sublimation of iodine is used to stain chromatography plates and in the detection of finger prints in forensic science.

Answer 2

Explanation:

Iodine is heated in a beaker to cause the iodine to sublimate. ... Solid iodine crystals form that are very shiny. Iodine does not form a liquid under standard pressure and thus undergoes a phase transition directly from solid to gas and gas to solid which can be seen on a phase diagram.