Formula of gypsum salt is

Options

A. `CaSO_(4).2H_(2)O`
B. `Ca_(2)SiO_(4)`
C. `2CaSO_(4).H_(2)O`
D. `CaSO_(4)`

Answer

A

Explanation

Gypsum is a soft sulphate mineral composed of calcium sulphate dihydrate, with the chemical formula `CaSO_(4).2H_(2)O`. It is widely minded and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard chalk and wall board.