Which of the following minerals does not contain iron ?

Options

A. Magnetite
B. Magnesite
C. Haematite
D. Limonite

Answer

To determine which mineral does not contain iron, we will analyze each of the given options based on their chemical formulas.

### Step 1: Analyze the first option - Magnetite
- **Chemical Formula**: Fe3O4
- **Analysis**: This mineral contains iron (Fe) as it is part of its formula.

### Step 2: Analyze the second option - Magnesite
- **Chemical Formula**: MgCO3
- **Analysis**: This mineral contains magnesium (Mg) and carbonate (CO3), but does not contain iron.

### Step 3: Analyze the third option - Hematite
- **Chemical Formula**: Fe2O3
- **Analysis**: This mineral contains iron (Fe) as it is part of its formula.

### Step 4: Analyze the fourth option - Limonite
- **Chemical Formula**: Fe2O3·3H2O
- **Analysis**: This mineral also contains iron (Fe) as it is part of its formula.

### Conclusion
After analyzing all the options, we find that:
- Magnetite contains iron.
- Hematite contains iron.
- Limonite contains iron.
- **Magnesite does not contain iron.**

Thus, the correct answer is **Option 2: Magnesite**.

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