Which of the following are properties of crystalline solid?A.Isotropic B.Sharp melting point C.Long range order D.Definite regular geometry

The properties of a crystalline solid include:

C. Long-range order: Crystalline solids have a highly ordered arrangement of atoms or molecules, extending over large distances. This regular arrangement is characterized by a repeating pattern called a crystal lattice.

D. Definite regular geometry: Crystalline solids have a well-defined, repeating geometric pattern. This pattern can be described by a set of crystallographic axes and angles. The atoms or molecules in a crystalline solid occupy specific positions within the crystal lattice.

A. Isotropic: Crystalline solids are typically not isotropic. Anisotropy refers to the variation in properties depending on the direction in a material. Crystals usually exhibit different properties along different crystallographic directions.

B. Sharp melting point: Crystalline solids generally have a sharp, well-defined melting point. This is because the arrangement of atoms or molecules in a crystal lattice is disrupted at a specific temperature, resulting in a phase transition from solid to liquid.

Therefore, the correct properties of a crystalline solid are:

Long-range order
Definite regular geometry
Sharp melting point