Choose the correct statements and example about hygroscopy and deliquescence substances:
  
Answer variants:
Concentrated sulphuric acid
Polypropylene
Deliquescent substances are used as drying agents.
Calcium chloride
Concentration of a solution may be defined as the amount of solvent present in a given amount of solution.
Hygroscopic substance may be amorphous solids or liquids.
 
1. Correct statement: 
  
2. Deliquescence substance example :
 
3. Hygroscopy substance example :