Metal which can be extracted from all three dolomite, magnesite and caranallite is

Options

A. Na
B. K
C. Mg
D. Ca

Answer

To solve the question, we need to identify the metal that can be extracted from the three minerals: dolomite, magnesite, and carnallite.

### Step-by-Step Solution:

1. **Identify the Chemical Formulas of the Ores:**
- **Dolomite:** The chemical formula for dolomite is \(CaCO_3 \cdot MgCO_3\). This indicates that it contains both calcium (Ca) and magnesium (Mg).
- **Magnesite:** The chemical formula for magnesite is \(MgCO_3\). This shows that it primarily contains magnesium (Mg).
- **Carnallite:** The chemical formula for carnallite is \(KCl \cdot MgCl_2\). This indicates that it contains potassium (K) and magnesium (Mg).

2. **Identify the Common Metal:**
- Now, we need to check which metal is present in all three ores.
- In dolomite, we have magnesium (Mg).
- In magnesite, we have magnesium (Mg).
- In carnallite, we also have magnesium (Mg).

3. **Conclusion:**
- The common metal present in all three ores (dolomite, magnesite, and carnallite) is magnesium (Mg).

Thus, the metal that can be extracted from all three ores is **Magnesium (Mg)**.

### Final Answer:
The metal which can be extracted from all three dolomite, magnesite, and carnallite is **Magnesium (Mg)**.

---