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| Q. |
Limestone is a raw material used by which industry? |
| A. | Aluminium |
| B. | Fertilizers |
| C. | Cement |
| D. | Petrochemicals |
| Answer» C. Cement | |
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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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