Which oxide of phosphorus is used extensively as a drying agent?
P2O3
P4O6
P4O10
P3O5
P4O10 is used extensively as a drying agent.
The drying agents like P2O5 and CaO cannot be used to dry hydrogen chloride gas because:
Calcium oxide and phosphorus pentoxide are very good drying agents but they are not used to dry HCl gas. Give reasons for each.