A solid substance P which is very hard is used in the construction of many buildings epiecialy flooring When substance P is heated strongly, it decompose to from another soolid Q and a gas R is given our Solid Q reacts with water with the releade of a lot of heat to from a substance S. When gas R is passed into a clear solutio of substance S, then a while precipitate of substance T is formed. The substance T has the same chemical composition as starting substance P.
(a) What is substance P? Write its common name as well as chemical formula.
(b) What is substance Q?
(c ) What is gas R?
(d) What is substance S ? What is its clear solution known as ?
(e) What is substance T ? Name any two natural forms in which substance T occurs in nature

Answer

(a) Calcium carbonate, Limestone, `CaCO_(3)` (b) Calcium carbonate ; Limestone and Marble