Question

A white powder which sets hard on adding water is also used in hospitals. name the powder how is it prepared. write its chemical reaction

Answer 1

The powder is Plaster of Paris (POP). It is prepared by heating gypsum at a temperature of 100°C in a rotatory kiln.
2CaSO4 . 2H2O ----------> 2CaSO4 . H2O + H2O