{"id":70077,"date":"2024-04-20T10:51:50","date_gmt":"2024-04-20T10:51:50","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=70077"},"modified":"2024-04-20T10:51:50","modified_gmt":"2024-04-20T10:51:50","slug":"which-mineral-is-used-extensively-in-the-cement-industry","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-mineral-is-used-extensively-in-the-cement-industry\/","title":{"rendered":"Which mineral is used extensively in the cement industry?"},"content":{"rendered":"

[amp_mcq option1=”Iron ore” option2=”Granite” option3=”Limestone” option4=”Sand” correct=”option3″]<\/p>\n

The correct answer is c) Limestone.<\/p>\n

Limestone is a sedimentary rock composed mostly of calcium carbonate (CaCO3). It is the most common type of limestone and is used in a variety of applications, including the cement industry. Limestone is used in cement because it is a source of calcium oxide (CaO), which is one of the main ingredients in cement. Calcium oxide reacts with silica (SiO2) and alumina (Al2O3) to form calcium silicate hydrate (C-S-H), which is the main binder in cement.<\/p>\n

Iron ore is a mineral that is used to make iron and steel. It is a primary source of iron, which is the main component of these metals. Iron ore is found in a variety of forms, including hematite, magnetite, and taconite.<\/p>\n

Granite is an igneous rock that is composed of quartz, feldspar, and mica. It is a hard, durable rock that is used in a variety of applications, including construction, countertops, and monuments.<\/p>\n

Sand is a granular material composed of finely divided rock and mineral particles. It is used in a variety of applications, including construction, glassmaking, and abrasives.<\/p>\n","protected":false},"excerpt":{"rendered":"

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