Answer :

(i) Importance of Limestone (CaCO3)

Specially precipitated, CaCO3 is extensively used in the manufacture of high quality paper.

It is also used in as an antacid, mild abrasive in toothpaste.

It is a constituent of chewing gum as a filler in cosmetics.

(ii) Importance of cement

Cement is an important building material.

It is used in concrete and in plastering.

It is used in the construction of bridges, dams and buildings.

(iii) Importance of Plaster of Paris

Plaster of Paris is extensively used in the building industry as well as plasters.

It is used in dentistry, in ornamental work and for taking the casts of statues and busts.

It is also used for immobilising (prevent from moving) the affected part of organ where there is bone fraction or sprain.

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