The impurities present in the ore when mined are called :

Options

A. flux
B. slag
C. gangue
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the impurities found in ores when they are mined. These impurities can affect the extraction and processing of metals from the ores.

2. **Identifying the Term**: The impurities present in the ore are specifically referred to as "gangue". Gangue consists of non-metallic minerals that are not valuable and are typically unwanted during the extraction process.

3. **Examples of Gangue**: Common examples of gangue materials include substances such as silica (SiO2), mica, clay, phosphorus, arsenic, and other non-metallic impurities. These materials are often found mixed with the desired ore.

4. **Importance of Gangue**: Understanding gangue is crucial because it needs to be removed during the ore processing to obtain the pure metal. The presence of gangue can complicate the extraction and refining processes.

5. **Conclusion**: Therefore, the impurities present in the ore when mined are called "gangue".

**Final Answer**: The impurities present in the ore when mined are called gangue.

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