Q.

Limestone is a raw material used by which industry?

A. Aluminium
B. Fertilizers
C. Cement
D. Petrochemicals
Answer» C. Cement
Explanation: Limestone is used as a raw- material for the manufacture of quicklime (calcium oxide), slaked lime (calcium hydroxide), cement and mortar. Clay and shale are also used as raw materials for the production of cement.
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