Name the material which are hard,sonorous, good conductor of heat and electricity.

Options

A. Non-metal
B. Metals
C. Both of these
D. None of these

Explanation

To answer the question regarding the materials that are hard, sonorous, and good conductors of heat and electricity, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Properties**:
- The materials in question need to be hard, sonorous, and good conductors of heat and electricity.

2. **Define the Terms**:
- **Hardness**: This property indicates that the material is strong and resistant to deformation.
- **Sonorous**: This means that the material produces a ringing sound when struck.
- **Good Conductors**: This refers to the ability of the material to conduct heat and electricity efficiently.

3. **Classify the Materials**:
- In chemistry, materials are primarily classified as metals and non-metals.
- Metals are generally known to possess the properties of being hard, sonorous, and good conductors of heat and electricity.

4. **Evaluate Non-Metals**:
- Non-metals, on the other hand, do not exhibit these properties. They are usually softer, non-sonorous, and poor conductors of heat and electricity.

5. **Conclusion**:
- Based on the properties and classifications discussed, the materials that are hard, sonorous, and good conductors of heat and electricity are **metals**.

### Final Answer:
The material that is hard, sonorous, and a good conductor of heat and electricity is **metals**.

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