Describe the importance of the following : (i) limestone (ii) cement (iii) plaster of Paris .

Describe the importance of the following : (i) limestone (ii) cement (

1.	Describe the importance of the following : (i) limestone (ii) cement (iii) plaster of Paris .
Answer» Solution :(i) Limestone . Specially precipitated `CaCO_(3)` is extensively used in the manufacture of high quality paper . It is also used as an antacid , mild abrasive in toothpaste , a constituent of chewing GUM and as a filler in cosmetics. (ii) Cement . It is an important building material . it is used in concrete and reinforced concrete , in plastering and in the construction of bridges , dams and buildings . (iii) Plaster of Paris . It is extensively used in the building INDUSTRY as well as in plasters. It is used in dentistry , in ORNAMENTAL work and for making casts of statues and busts . It is also used in surgical bandages known as plasters of immoblising the affected part of ORGAN where there is bone fracture or sprain.