Among the following statements the incorrect one is:

Options

A. Calamine and siderite are carbonates
B. Argentite and cuprite are oxides
C. Zinc blende and galena are sulphides
D. Malachite and azurite are minerals of copper

Answer

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

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Option A**: "Calamine and siderite are carbonates."
- **Calamine**: The general formula for calamine is \( \text{Zn}_4\text{Si}_2\text{O}_7\text{(OH)}_2 \cdot n\text{H}_2\text{O} \), which indicates that calamine is primarily an oxide of zinc, not a carbonate.
- **Siderite**: The general formula for siderite is \( \text{FeCO}_3 \), which is indeed a carbonate.
- **Conclusion**: This statement is incorrect because calamine is not a carbonate.

2. **Option B**: "Argentite and cuprite are oxides."
- **Argentite**: The formula for argentite is \( \text{Ag}_2\text{S} \), which is a sulfide, not an oxide.
- **Cuprite**: The formula for cuprite is \( \text{Cu}_2\text{O} \), which is an oxide.
- **Conclusion**: This statement is also incorrect because argentite is not an oxide.

3. **Option C**: "Zinc blend and galena are sulfides."
- **Zinc Blend (Sphalerite)**: The formula for zinc blend is \( \text{ZnS} \), which is a sulfide.
- **Galena**: The formula for galena is \( \text{PbS} \), which is also a sulfide.
- **Conclusion**: This statement is correct.

4. **Option D**: "Malachite and azurite are minerals of copper."
- **Malachite**: The formula for malachite is \( \text{Cu}_2\text{(OH)}_2\text{CO}_3 \), which is a copper carbonate.
- **Azurite**: The formula for azurite is \( \text{Cu}_3\text{(OH)}_2\text{(CO}_3\text{)}_2 \), which is also a copper carbonate.
- **Conclusion**: This statement is correct.

### Final Conclusion:
The incorrect statements are **Option A** and **Option B**. However, since the question asks for one incorrect statement, we can conclude that **Option A** is the first incorrect statement identified.

### Answer:
**Option A** is the incorrect statement.

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