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| Q. |
Which one of the following is used in large quantities in Cement Industry? |
| A. | Gypsum |
| B. | Limestone |
| C. | Coal |
| D. | Clay |
| Answer» B. Limestone | |
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Explanation: Limestone, as used by the minerals industry, is any rock composed mostly of calcium carbonate (CaCO3). Limestone is used to produce Portland cement, as aggregate in concrete and asphalt, and in an enormous array of other products, making it a truly versatile commodity. Portland cement is essential to the building industry. |
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