Which of the following statements is incorrect?

Options

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

Answer

To determine which of the statements is incorrect, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the compounds mentioned in the statements**:
- Calamine
- Siderite
- Argentite
- Cuprite

2. **Check the chemical formulas**:
- **Calamine**: The formula is ZnCO3 (Zinc Carbonate).
- **Siderite**: The formula is FeCO3 (Iron Carbonate).
- **Argentite**: The formula is Ag2S (Silver Sulfide).
- **Cuprite**: The formula is Cu2O (Copper(I) Oxide).

3. **Classify the compounds**:
- Calamine (ZnCO3) and Siderite (FeCO3) are carbonates, not oxides.
- Argentite (Ag2S) is a sulfide, not an oxide.
- Cuprite (Cu2O) is indeed an oxide.

4. **Evaluate the statements**:
- The statement claims that Calamine, Siderite, Argentite, and Cuprite are oxides.
- Since both Calamine and Siderite are carbonates, and Argentite is a sulfide, this statement is incorrect.

5. **Conclusion**:
- The incorrect statement is that Calamine, Siderite, Argentite, and Cuprite are oxides.

### Final Answer:
The incorrect statement is that Calamine, Siderite, Argentite, and Cuprite are oxides.

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