Question

Define:

a) Hygroscopic substance

b) Efflorescence

c) Deliquescence

d) Dehydrating agents​

Answer 1

"Answer:

a)The substances which attracts water from its surroundings through, either absorption or adsorption.

b)It is the loss of water (or a solvent) of crystallization from a hydrated or solvated salt to the atmosphere on exposure to air.

Na2CO3.10H2O loses nine molecules of water of crytilization is known as efflorosence  

Na2CO3.10H2O----Na2CO3.H2O + 9H2O

c) It is a type of behavior in which when d salts are exposed to atmosphere they absorb moisture in large amounts.

Example:FeCl3

D) Dehydrating agent is a substance which dehydrates (removes water molecule) from a compound.

Example: H2SO4

"