what is the difference between efflorescence and hydroscopic and deliq

1.	what is the difference between efflorescence and hydroscopic and deliquescent
Answer» Hygroscopic and deliquescent materials are both able to absorb moisture from the air. However, hygroscopy and deliquescence don\'t mean precisely the same thing: Hygroscopic materials absorb moisture, while deliquescent materials absorb moisture to the extent that the substance dissolves in water. \xa0Deliquescent substances\xa0-\xa0certain solid substances, when exposed to air absorb water, enough to form solutions. Example, solid NaOH, CaCl2, CaCl2. 6H2O, P4O10\xa0(forms HPO3), FeCl3, KOH, MgCl2.\xa0Hygroscopic Substances -\xa0substances absorb water from air, but not enough to form solutions. Examples of such substances include CaO, NaNO3, NaCl, Sucrose and CuO. Also, certain liquid substances absorb water from the air to get diluted - these are also regarded as being hygroscopic. Example, conc. H2SO4\xa0and conc. HCl.\xa0lf a hydroscopic substance absorbs so much moisture that an aqueous solution is formed, the substance becomes deliquescent.

what is the difference between efflorescence and hydroscopic and deliquescent