(a) Define efflorescence. Give examples.
(b) Define deliquescence. Give examples.
(a) Efflorescence is the property of some substances to lose wholly, or partly their water of crystallization when their crystals are exposed to dry air even for a short time. Examples are: Washing soda, Glauber's salt, Epsom salt
(b) Certain water-soluble substances, when exposed to the atmosphere at ordinary temperature, absorb moisture from the atmospheric air to become moist and ultimately dissolve in the absorbed water, forming a saturated solution. For example Caustic soda, Caustic potash