A mineral is usually associated with a large amount of unwanted material called :

Options

A. Gangue
B. Flux
C. Slag
D. Ore

Answer

To solve the question, we need to identify the term that describes the unwanted material associated with a mineral. Let's break down the options provided:

1. **Gangue**: This term refers to the earthy impurities or unwanted materials that are found alongside the ore in a mineral deposit. Gangue is typically composed of various minerals that do not contain any valuable metals or elements.

2. **Flux**: This is a chemical substance that is used in metallurgy to aid in the extraction of metals from ores. It helps to combine with the gangue to form slag but is not the unwanted material itself.

3. **Slag**: This is a byproduct formed during the smelting process when flux combines with gangue. Slag is not the unwanted material found in the mineral but rather a product of the refining process.

4. **Ore**: This term refers to the mineral from which a valuable substance can be extracted economically. It is not the unwanted material but rather the desired material.

Based on this analysis, the correct answer to the question is:

**Answer: Gangue**

### Step-by-Step Solution:
1. **Identify the terms**: Understand the definitions of gangue, flux, slag, and ore.
2. **Analyze the options**: Determine which term refers to the unwanted material associated with a mineral.
3. **Select the correct answer**: Conclude that gangue is the correct term for the unwanted material.