Calcium phosphate (V) occurs in nature gas

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. The anhydrous calcium sulphate is called :

Calcium phosphate is present in tooth enamel. Its nature is

The nature of Calcium phosphate present in tooth enamel is:

Solution of calcium phosphate (molecular mass, M) in water is w g per at 25^(@) C, its solubility product at 25^(@) C will be approximately :-

Calcium occurs in