Wood charcoal is used to decolourise sugar because it:

Options

A. Adsorbs coloured material
B. Absorbs decolorised material
C. Reduces coloured material
D. None of these

Answer

To solve the question "Wood charcoal is used to decolourise sugar because it:", we need to analyze the options provided and understand the properties of wood charcoal.

### Step-by-Step Solution:

1. **Understanding the Role of Wood Charcoal**:
- Wood charcoal is a form of carbon that is produced by the pyrolysis of wood in the absence of oxygen. It has a highly porous structure.

2. **Identifying the Process**:
- The process of decolourising sugar involves removing the colored impurities present in sugar. This is typically achieved through adsorption.

3. **Adsorption vs Absorption**:
- **Adsorption** is the process where molecules from a gas or liquid adhere to the surface of a solid or liquid.
- **Absorption**, on the other hand, involves the entire volume of the material being penetrated by the substance.

4. **Analyzing the Options**:
- **Option A: Adsorbs colored material** - This suggests that wood charcoal captures the colored impurities on its surface, which is correct.
- **Option B: Absorbs decolorized material** - This is incorrect because wood charcoal does not absorb the decolorized material; it is meant to remove color.
- **Option C: Reduces colored material** - This is also incorrect because wood charcoal does not chemically reduce the color; it physically adsorbs it.
- **Option D: None of these** - This is incorrect since we have a valid option.

5. **Conclusion**:
- The correct answer is **Option A: Adsorbs colored material**. Wood charcoal is effective in decolourising sugar because it has a large surface area due to its porous structure, allowing it to adsorb the colored impurities present in sugar.

### Final Answer:
Wood charcoal is used to decolourise sugar because it **adsorbs colored material**.