The sharp melting point of crystalline solids compared to amorphous solids is due to

Options

A. a regular arrangement of consituent particles observed over a short distance in the crystal lattice.
B. a regular arrangmenet of constituent particles observed over a long distance in the crystal lattice
C. same arrangement of constituent particles in different directions.
D. none of these

Answer

B

Explanation

A solid is said to be crystalline if the various constituent structural units (atoms, ions or molecuels) of which the solid is made, are arranged in a definite gerometrical pattern within the solid. The type of forces in crystalline solids are of long range order due to which they have sharp melting point.