Calcium sulphate is found in nature in t...

Calcium sulphate is found in nature in two forms, anhydrous calcium sulphate and hydrated calcium sulphate. When anhydrous calcium sulphate is heated with coke, sulphur dioxide gas is obtained. When hydrated calcium suphate is heated to `200^(@)`C, it forms anhydrous salt.
Q. What is the product formed when hydrated `CaSO_(4)` is heated to `125^(@)`C instead of `200^(@)C`?

`(CaSO_(4))_(2)H_(2)O`

`CaSO_(4)(3)/(4)H_(2)O`

`CaSO_(4)`

`CaO+SO_(3)`

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