Question

The carbonate ore among the following is

• A. Bauxite
• B. Magnesite
• C. Haematite
• D. Carnalite

Answer 1

The Correct Option is B

To solve the problem, we need to identify which of the following is a carbonate ore.

1. Understanding Carbonate Ores:
A carbonate ore is a type of mineral that contains carbonate ions ($CO_3^{2-}$) as part of its chemical composition. Common carbonate ores include minerals like magnesite ($MgCO_3$), calcite ($CaCO_3$), and dolomite ($CaMg(CO_3)_2$).

2. Analyzing the Given Ores:

- Bauxite: Bauxite is an ore of aluminum and primarily consists of aluminum oxide minerals like gibbsite, boehmite, and diaspore. It is not a carbonate ore.
- Magnesite: Magnesite ($MgCO_3$) is a carbonate ore of magnesium. It is the correct answer.
- Haematite: Haematite ($Fe_2O_3$) is an ore of iron, and it is an oxide ore, not a carbonate.
- Carnalite: Carnalite ($KMgCl_3·6H_2O$) is a potassium-magnesium chloride mineral, not a carbonate ore.

Final Answer:
The carbonate ore among the given options is $ {\text{Magnesite}} $.