Question

Which of the following industries use limestone as their raw material?
a. Steel
b. Cement
c. Sugar
d. Jute

Answer 1

Hint: This industry is most widely associated with construction. Limestone is a type of a sedimentary rock that is found naturally occurring in the earth’s environment. The rock comprises primarily a chemical compound calcium carbonate in the form of calcite which is again a type of mineral.

Complete answer:The cement industry uses limestone as its raw material. It is used as a construction material, and to purify and clean iron in blast furnaces. It's also used in the manufacture of glass, and cement.
The other uses of limestone are as follows:
a. Limestone is used in the agricultural industry to make ‘agricultural lime or “Aglime” which is a product used to neutralize soil acidity as well as free up soil minerals like phosphates.
b. Pounded limestone is used in the textile, paint, paper, rubber, glass and plastic factories. They are mostly used as fillers. Apart from these industries, it is used in the steel industry in the production process where limestone is used to remove impurities. The minerals found in limestones are also used in pharmaceuticals, cosmetic products, baking soda, and even toothpaste companies.
c. Crushed limestone is used as a filter stone in sewage disposal systems. Limestone in its powdered or crushed form is also used as a tool to soak in the pollutants or manage coal mine dust at a coal-mining facility. Lime which is a byproduct of limestone is used to treat acids and wastewater, industrial waste, animal waste, and water sources.
Thus, the correct option is (B).

Note: An interesting fact about limestone is that Limestone turns into the metamorphic rock marble when subjected to high amounts of pressure and heat.