1)Sublimation
2)Dry ice (solid carbon dioxide) at room temperature and at one atmosphere, sublimes without any residue.
Name the process that happens when:
(a) Dry ice is kept at room temperature and at one atmospheric pressure.
(b) A potassium permanganate crystal is in a beaker and water is poured into the beaker by stirring.
(c) An acetone bottle is left open and the bottle becomes empty.
(d) Milk is churned to separate cream from it.