Impurities present in ore are called

Options

A. flux
B. slag
C. matrix
D. gangue

Answer

To solve the question "Impurities present in ore are called," we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term used to describe impurities found in ore.

2. **Analyzing the Options**:
- **Option A: Flux**:
- Definition: Flux is a substance added to ores during smelting to help remove impurities. It is not the impurities themselves.
- Conclusion: This option is incorrect.

- **Option B: Slag**:
- Definition: Slag is the byproduct formed when flux combines with gangue (the impurities) during the smelting process. It is not the impurities themselves.
- Conclusion: This option is incorrect.

- **Option C: Matrix**:
- Definition: The term "matrix" typically refers to the material in which something is embedded. In the context of ores, it does not specifically refer to impurities.
- Conclusion: This option is incorrect.

- **Option D: Gangue**:
- Definition: Gangue refers specifically to the unwanted materials or impurities that are found in ore. This is the correct term for impurities present in ore.
- Conclusion: This option is correct.

3. **Final Answer**: Based on the analysis, the impurities present in ore are called **Gangue**.