Characteristics of crystalline solid are

Options

A. Long range order
B. Disordered arrangement
C. Short range order
D. None of these

Answer

### Step-by-Step Solution:

1. **Definition of Crystalline Solids**: Crystalline solids are materials whose constituents (atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

2. **Characteristic Shape**: Crystalline solids have a definite and characteristic geometric shape. This shape is a result of the orderly arrangement of particles within the solid.

3. **Regular Arrangement**: The particles in crystalline solids are arranged in a regular, repeating pattern. This regularity contributes to their distinct shapes and properties.

4. **Sharp Melting Point**: Crystalline solids have a specific melting point at which they transition from solid to liquid. This melting point is sharp, meaning that the solid will melt at a precise temperature.

5. **Long Range Order**: Crystalline solids exhibit long-range order, meaning that the arrangement of particles is consistent and predictable over large distances within the material.

6. **Anisotropic Properties**: Crystalline solids are anisotropic, meaning their physical properties (such as refractive index, electrical conductivity, etc.) vary depending on the direction in which they are measured. This is in contrast to isotropic materials, which have uniform properties in all directions.

7. **True Solids**: Crystalline solids are considered true solids because they maintain a definite shape and volume, unlike amorphous solids which do not have a well-defined structure.

8. **Examples**: Common examples of crystalline solids include metals like copper, silver, and iron, as well as ionic compounds like common salt (sodium chloride).

### Summary of Characteristics:
- Definite characteristic shape
- Regular arrangement of particles
- Sharp and characteristic melting point
- Long range order
- Anisotropic properties
- True solids