What is the chemical formula for marble?

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DFCCIL Executive CBT1 Civil 25 Aug 2023 Shift 3 Official Paper
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  1. Ca(OH)2
  2. CaSO4
  3. CaO
  4. CaCO3

Answer (Detailed Solution Below)

Option 4 : CaCO3
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Detailed Solution

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The correct answer is CaCO3.

Key Points

  • Marble is primarily composed of calcium carbonate, with the chemical formula CaCO3.
  • It is formed from the metamorphism of limestone, which is also composed mainly of calcium carbonate.
  • Marble is known for its distinctive veined appearance, which is due to impurities such as clay, silt, sand, and iron oxides.
  • Due to its durability and aesthetic appeal, marble is commonly used in sculpture, building materials, and interior design.
  • Calcium carbonate (CaCO3) is also found in other forms such as chalk, limestone, and calcite.

Additional Information

  • Metamorphic Rocks
    • Marble is a type of metamorphic rock formed under the influence of high temperature and pressure.
    • Metamorphic rocks are characterized by the alteration of pre-existing rocks (protolith) without the rock melting into liquid magma.
    • Common examples include slate (from shale), schist, gneiss, and quartzite.
  • Uses of Marble
    • Marble is extensively used in construction, notably for flooring, countertops, and wall cladding.
    • It is also a preferred material for artistic sculptures due to its fine grain and ability to polish well.
    • Historical landmarks like the Taj Mahal, the Lincoln Memorial, and Michelangelo's David are made of marble.
  • Calcium Carbonate Applications
    • Calcium carbonate is used in the production of cement, lime, and as a raw material in the steel industry.
    • It is widely used as a dietary supplement, antacid, and in various medicinal formulations.
    • In the agricultural sector, it is used to neutralize acidic soil conditions.

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