The pair having oxide and carbonate ore respectively

Options

A. Chromite, Pyrolusite
B. Cassiterite, Calamine
C. Haematite, Galena
D. Malachite, Bauxite

Answer

To solve the question regarding the pair having oxide and carbonate ore respectively, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Types of Ores**:
- Oxide ores are minerals that contain metal combined with oxygen.
- Carbonate ores contain metal combined with carbonate ions (CO3).

2. **Analyzing Option 1: Chromite and Pyrolusite**
- Chromite (FeCr2O4) is an oxide ore.
- Pyrolusite (MnO2) is also an oxide ore.
- **Conclusion**: Both are oxide ores. This option is incorrect.

3. **Analyzing Option 2: Cassiterite and Calamine**
- Cassiterite (SnO2) is an oxide ore.
- Calamine (ZnCO3) is a carbonate ore.
- **Conclusion**: This option has one oxide ore (Cassiterite) and one carbonate ore (Calamine). This option is correct.

4. **Analyzing Option 3: Hematite and Galena**
- Hematite (Fe2O3) is an oxide ore.
- Galena (PbS) is a sulfide ore.
- **Conclusion**: This option has one oxide ore (Hematite) and one sulfide ore (Galena). This option is incorrect.

5. **Analyzing Option 4: Malachite and Bauxite**
- Malachite (Cu2CO3(OH)2) is a carbonate ore.
- Bauxite (Al2O3·2H2O) is an oxide ore.
- **Conclusion**: This option has one carbonate ore (Malachite) and one oxide ore (Bauxite). However, it does not fit the requirement of having a pair with one oxide and one carbonate ore specifically.

6. **Final Conclusion**: The correct pair having an oxide and carbonate ore respectively is found in Option 2: Cassiterite (oxide) and Calamine (carbonate).

### Final Answer:
The pair having oxide and carbonate ore respectively is **Cassiterite (SnO2) and Calamine (ZnCO3)**.

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