Which of the following is not the correct name of the formula of the ore given with it ?

Options

A. `MgSO_(4)*7H_(2)O`- Epsom salt
B. `CuCO_(3)*CU(OH)_(2)`-Malachite
C. `KAlSi_(3)O_(8)`-Feldspar
D. `KCl*MgCl_(2)*6H_(2)O` Dolomite

Explanation

To determine which of the following names is not correctly associated with its ore formula, we will analyze each option provided.

1. **Magnesium Sulfate**: The hydrated form of magnesium sulfate is known as Epsom salt. The formula for Epsom salt is MgSO₄·7H₂O. This statement is correct.

2. **Malachite**: Malachite is indeed a combination of copper carbonate and copper hydroxide. Its formula can be represented as Cu₂CO₃(OH)₂. This statement is also correct.

3. **Feldspar**: Feldspar can contain potassium, sodium, or calcium ions along with the AlSi₃O₈ unit. It can be represented as KAlSi₃O₈ (orthoclase), NaAlSi₃O₈ (albite), or CaAl₂Si₂O₈ (anorthite). This statement is true as well.

4. **Dolomite**: Dolomite is an ore that contains both magnesium and calcium. However, its correct formula is CaMg(CO₃)₂, which is a combination of calcium carbonate and magnesium carbonate. The formula given as MgCO₃ and CaCO₃ is incorrect, as it does not represent dolomite accurately.

After analyzing all the options, we find that the incorrect name associated with its ore formula is:

**Answer**: Dolomite (the correct formula should be CaMg(CO₃)₂).