Graphite is used as a pencil lead because

Options

A. it has a high melting point.
B. it is a good conductor of heat and electricity.
C. it is soft.
D. it is highly resistant to chemicals.

Explanation

**Step-by-Step Solution:**

1. **Identify the Material**: Graphite is the material used in pencil leads. It is a form of carbon and is classified as a non-metal.

2. **Properties of Graphite**: Understand the key properties of graphite that make it suitable for use in pencils:
- **Softness**: Graphite is soft and can easily leave a mark on paper.
- **Smoothness**: The smooth texture of graphite allows it to glide over paper, making writing easier.
- **Impression on Paper**: When graphite is used to write, it leaves a clear impression on the paper, which is essential for writing.

3. **Evaluate the Options**: The question may provide multiple-choice answers regarding why graphite is used in pencil leads. We need to analyze each option:
- **Option 1**: High melting point - This is irrelevant because the melting point does not affect its use in writing.
- **Option 2**: Good conductor of heat and electricity - This is also irrelevant as the pencil does not require conduction of heat or electricity.
- **Option 3**: Softness - This is a valid reason as it allows graphite to leave an impression on paper.
- **Option 4**: Highly resistant to chemicals - This is not a necessary property for pencil lead.

4. **Conclusion**: The most relevant reason for using graphite in pencil leads is its softness, which allows it to leave a clear impression on paper when writing.

5. **Final Answer**: Graphite is used as pencil lead because it is soft and smooth, allowing it to leave an impression on paper.

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