A Substance which reacts with gangue to form fusible material is called

Options

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

Answer

To solve the question, "A substance which reacts with gangue to form fusible material is called," we can follow these steps:

### Step 1: Understand the Terms
- **Gangue**: This refers to the unwanted materials or impurities present in the ore. It is the material that needs to be separated during the extraction of metals.

### Step 2: Identify the Role of the Substance
- The question is asking for a substance that reacts with gangue. This substance should be able to combine with gangue to produce a fusible material, which is a material that can be melted or fused.

### Step 3: Analyze the Options
1. **Flux**: A substance that combines with gangue to form a fusible compound.
2. **Catalyst**: A substance that speeds up a chemical reaction without being consumed in the process.
3. **Ore**: A naturally occurring solid material from which a metal or valuable mineral can be extracted.
4. **Slag**: The waste material produced from the smelting of metal ores, which often includes the flux and gangue.

### Step 4: Determine the Correct Answer
- The correct answer is **Flux**. Flux is specifically designed to react with gangue to form a fusible material, which can then be easily removed from the metal during the extraction process.

### Final Answer
A substance which reacts with gangue to form fusible material is called **Flux**.

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