Which of the following is/are correctly matched ?

Options

A. Copper-Bessemer converter
B. Iron-Blast furnance
C. Chromium - Aluminothermic process
D. Tin-Electrolytic reduction

Explanation

To determine which of the following pairs are correctly matched, we will analyze each pair one by one.

1. **Copper - Bessemer Converter**:
- The Bessemer converter is used in the extraction of copper from its ores, particularly from copper(I) oxide (Cu2O) and copper(I) sulfide (Cu2S). The process involves the conversion of matte (which contains copper) into blister copper.
- Therefore, this pair is **correctly matched**.

2. **Iron - Blast Furnace**:
- The blast furnace is a key method for extracting iron from its ores, primarily hematite (Fe2O3) and magnetite (Fe3O4). The process involves several zones in the furnace where different reactions occur, ultimately leading to the production of pig iron.
- Thus, this pair is also **correctly matched**.

3. **Chromium - Aluminothermic Process**:
- The aluminothermic process, also known as the Goldschmidt thermite process, is indeed used to extract chromium from its oxide (Cr2O3) using aluminum as a reducing agent. The reaction produces aluminum oxide and chromium.
- Hence, this pair is **correctly matched**.

4. **Tin - Electrolytic Reduction**:
- Tin is primarily extracted from its ore, SnO2, through carbon reduction, not through electrolytic reduction. Therefore, this pair is **incorrectly matched**.

### Conclusion:
- The correctly matched pairs are:
- Copper - Bessemer Converter
- Iron - Blast Furnace
- Chromium - Aluminothermic Process
- The incorrectly matched pair is:
- Tin - Electrolytic Reduction

### Final Answer:
The correctly matched pairs are:
1. Copper - Bessemer Converter
2. Iron - Blast Furnace
3. Chromium - Aluminothermic Process