Amoung the following statements, the incorrect statement is :

Options

A. calamine and cerrusite are carbonate ores
B. rutile and cuprite are oxide ores
C. zinc blende and pyrites are sulphide ores
D. malachite and azurite are sulphate ores of Cu

Answer

To determine the incorrect statement among the given options, let's analyze each one step by step.

### Step 1: Analyze Option 1
**Statement:** Calamine and Cerucite are carbonate ores.
**Explanation:**
- Calamine is Zinc Carbonate (ZnCO₃).
- Cerucite is Lead Carbonate (PbCO₃).
Both are indeed carbonate ores.
**Conclusion:** This statement is correct.

### Step 2: Analyze Option 2
**Statement:** Rutile and Cuprates are oxide ores.
**Explanation:**
- Rutile is Titanium Dioxide (TiO₂), which is an oxide.
- Cuprates refer to copper oxides, such as CuO (Copper(II) oxide) or Cu₂O (Copper(I) oxide).
Both are oxide ores.
**Conclusion:** This statement is correct.

### Step 3: Analyze Option 3
**Statement:** Zinc blende and pyrite are sulphide ores.
**Explanation:**
- Zinc blende is Zinc Sulfide (ZnS).
- Pyrite is Iron Sulfide (FeS₂), also known as fool's gold.
Both are indeed sulphide ores.
**Conclusion:** This statement is correct.

### Step 4: Analyze Option 4
**Statement:** Malachite and Azurite are sulphate ores of copper.
**Explanation:**
- Malachite is a carbonate mineral with the formula Cu₂CO₃(OH)₂ (Copper Carbonate Hydroxide).
- Azurite is also a carbonate mineral with the formula Cu₃(CO₃)₂(OH)₂ (Copper Carbonate Hydroxide).
Neither of these is a sulphate ore; they are both carbonate ores.
**Conclusion:** This statement is incorrect.

### Final Conclusion
The incorrect statement is **Option 4: Malachite and Azurite are sulphate ores of copper.** They are actually carbonate ores.

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