Is a gypsum caso4.2h2o

Yes, gypsum is chemically represented as CaSO₄·2H₂O, which indicates that it consists of calcium sulfate (CaSO₄) combined with two molecules of water (2H₂O). This mineral is commonly used in construction and agriculture, particularly in the production of plaster and drywall. The presence of water in its structure is what classifies it as a hydrate.