Which of the following is an ore of zinc?

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RRB JE CBT I - (Held On: 30 May 2019 Shift 1)
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  1. Calamine
  2. Dolomite
  3. Hematite
  4. Cryolite

Answer (Detailed Solution Below)

Option 1 : Calamine
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The correct answer is Calamine

Key Points

  • Calamine is an ore of zinc.
  • It primarily consists of zinc carbonate (ZnCO3).
  • Calamine is one of the important sources of zinc, which is used in various applications such as galvanization, alloy production, and the manufacturing of batteries.
  • Other ores of zinc include sphalerite (zinc sulfide) and smithsonite (zinc carbonate).

Additional Information

  • Dolomite is a mineral composed of calcium magnesium carbonate (CaMg(CO3)2) and is not an ore of zinc.
  • Hematite is an iron ore (Fe2O3).
  • Cryolite is an ore of aluminum used in the electrolytic processing of aluminum.
  • Zinc is an essential element used in various industries, including construction, automotive, and electronics.
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