Solid which do not show the same physical properties in different directions are called:

Options

A. pseudo solids
B. isotropic solids
C. polymorphic solids
D. anisotropic solids

Answer

To solve the question regarding solids that do not show the same physical properties in different directions, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**:
The question asks for the type of solids that exhibit different physical properties when measured in different directions.

2. **Identifying Key Terms**:
The key term here is "different physical properties in different directions." This suggests a specific characteristic of certain solids.

3. **Exploring the Options**:
The options provided are:
- Pseudosolids
- Isotropic
- Polymorphic
- Anisotropic solids

4. **Defining Each Option**:
- **Pseudosolids**: These are materials that behave like solids but can flow like liquids under certain conditions.
- **Isotropic Solids**: These solids exhibit the same physical properties in all directions.
- **Polymorphic**: This term refers to substances that can exist in more than one form or crystal structure.
- **Anisotropic Solids**: These solids exhibit different physical properties in different directions.

5. **Analyzing the Definitions**:
From the definitions, we can see that:
- Isotropic solids are the opposite of what the question describes.
- Pseudosolids and polymorphic do not specifically relate to the directional properties of solids.

6. **Conclusion**:
The only option that matches the description of solids that do not show the same physical properties in different directions is **Anisotropic Solids**.

### Final Answer:
The solids which do not show the same physical properties in different directions are called **Anisotropic Solids**.

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