Which of the following is correct ?

Options

A. Tin stone is magnetic in nature
B. Wolframite is non - magnetic in nature
C. Wolframite is `FeWO_(4). MnWO_(4)`
D. Cassiterite and rutile are sulphides ore

Answer

To solve the question, we need to analyze each statement provided and determine which one is correct.

### Step-by-Step Solution:

1. **Analyze the First Statement: "Tin stone is magnetic in nature."**
- Tin stone, also known as cassiterite, is primarily composed of tin dioxide (SnO2). It is known to be non-magnetic.
- **Conclusion:** This statement is incorrect.

**Hint:** Remember the properties of materials; tin stone is non-magnetic.

2. **Analyze the Second Statement: "Wulframite is non-magnetic in nature."**
- Wulframite is an ore of tungsten and iron, with the formula FeMnWO4. It is known to exhibit magnetic properties.
- **Conclusion:** This statement is also incorrect.

**Hint:** Recall that wulframite contains iron, which contributes to its magnetic properties.

3. **Analyze the Third Statement: "Wulframite is FeWO4.MnWO4."**
- The formula for wulframite is often written as FeMnWO4, which indicates that it contains both iron (Fe) and manganese (Mn) along with tungsten (WO4).
- **Conclusion:** This statement is correct in the context of the components of wulframite.

**Hint:** Focus on the chemical composition; wulframite contains both iron and manganese.

4. **Analyze the Fourth Statement: "Cassiterite and rutile are sulfidose."**
- Cassiterite is tin oxide (SnO2) and rutile is titanium oxide (TiO2). Neither of these minerals is classified as sulfidose, which typically refers to sulfide minerals.
- **Conclusion:** This statement is incorrect.

**Hint:** Understand the classification of minerals; cassiterite and rutile are oxides, not sulfides.

### Final Conclusion:
The correct statement among the options provided is: **"Wulframite is FeWO4.MnWO4."**