Efflorescent substances (e.g. sodium carbonate decahydrate, copper(II) sulfate pentahydrate) lose some or all of their water of crystallisation when exposed to the air. Hygroscopic substances (e.g. concentrated sulphuric acid, calcium oxide) absorb water from the atmosphere but do not dissolve in it.
Something that is deliquescent absorbs moisture from the air and dissolves in it. Something that is efflorescent loses moisture to the air and turns to a fine powder.
Acetone is not known as hygroscopic.
Hygroscopic substances include cellulose fiber such as ethanol, methanol and diesel fuel. As hydrogen bonding causes pure ethanol to readily absorbs water from the air, ethanol is considered to be hygroscopic.
In crystalline form it's non-hygroscopic, or has only slight hygroscopicity. In powder form it is, yes.
Substances which absorb moisture from atmosphere without dissolving in it are - HYGROSCOPIC substances. They are used as "drying agents". ex: CaO, ethyl alcohol, concentrated sulphuric acid.
Potassium hydroxide is hygroscopic and deliquescent.
efflorescent substances are substances which looses moisture partly or completely to the atmosphere and changes in to amorphous powder. deliquecent substances are substances which absorb moisture from the atmosphere and turn into a saturated solution.
Something that is deliquescent absorbs moisture from the air and dissolves in it. Something that is efflorescent loses moisture to the air and turns to a fine powder.
A state or time of flowering
Calcium chloride easily absorb water, it is hygroscopic.
Non-Hygroscopic
efflorescent- washing soda, copper sulphate, glauber salt deliquescent -calcium chloride, sodium hydroxide, iron3 chloride
Acetone is not known as hygroscopic.
The deliquescent substances becomes soluble after absorbing water from the surroundings i.e., a solution is produced. For e.g, calcium chloride. A hygroscopic substance only absorbs water.For e.g, sulphuric acid.
The hair of the tail of horse is hygroscopic material.
Polyol Ester is also hygroscopic
Hygroscopic substances are used to absorb humidity.