Graphite is used in the manufacture of crucibles where a small quantity of metals can be melted. It is also used as electrodes. Which of the following properties of graphite is not exploited in these two given applications?

Options

A. Highly resistance to chemicals.
B. Soft nature.
C. High melting point.
D. Good electrical conductivity.

Explanation

To determine which property of graphite is not exploited in the manufacture of crucibles and electrodes, we can analyze the properties of graphite and how they relate to these applications.

### Step-by-Step Solution:

1. **Identify the Applications**:
- Graphite is used in the manufacture of crucibles, which are vessels that can withstand high temperatures to melt metals.
- Graphite is also used as electrodes in various electrical applications.

2. **List the Properties of Graphite**:
- **Highly resistant to chemicals**: Graphite does not react easily with acids or bases, making it durable in chemical environments.
- **Soft nature**: Graphite is known to be soft and can be easily scratched or marked.
- **High melting point**: Graphite has a very high melting point, which allows it to withstand extreme temperatures without melting.
- **Good electrical conductivity**: Graphite is an excellent conductor of electricity, which is essential for its use in electrodes.

3. **Analyze Each Property in Relation to the Applications**:
- **Highly resistant to chemicals**: This property is useful for crucibles as they need to resist chemical reactions when melting metals.
- **Soft nature**: This property does not contribute to the functionality of crucibles or electrodes, as both need to be hard and durable.
- **High melting point**: This property is crucial for crucibles, as they must withstand high temperatures without melting.
- **Good electrical conductivity**: This property is essential for electrodes, as they need to conduct electricity effectively.

4. **Determine the Property Not Exploited**:
- The property that is not exploited in the manufacture of crucibles and electrodes is the **soft nature** of graphite. Both applications require materials that are hard and can withstand high temperatures and physical stress.

### Final Answer:
The property of graphite that is not exploited in the manufacture of crucibles and electrodes is **soft nature**.

---