Which of the following is not a common property of plastics?

Options

A. Non-reactive
B. Light in weight
C. Durable
D. Good conductor of electricity

Explanation

**Step-by-Step Solution:**

1. **Identify the Properties of Plastics:**
- The question asks which of the options is not a common property of plastics. We need to analyze the properties listed.

2. **Evaluate Each Property:**
- **Non-reactive:** Plastics are generally non-reactive, which makes them suitable for various applications, such as in containers for food and drinks.
- **Lightweight:** Plastics are known for being lightweight, which makes them easy to handle and transport.
- **Durable:** Plastics are durable and can last a long time without degrading, which is why they are widely used in many products.
- **Good conductor of electricity:** This is where we need to focus. Plastics are actually poor conductors of electricity and heat, which is why they are often used as insulators.

3. **Conclusion:**
- Among the properties listed, "good conductor of electricity" is not a common property of plastics. In fact, it is the opposite; plastics are bad conductors of electricity.

**Final Answer:** The property that is not common to plastics is "good conductor of electricity."

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