Question

The sharp melting point of crystalline solids is due to ___________.

• A. a regular arrangement of constituent particles observed over a short distance in the crystal lattice.
• B. a regular arrangement of constituent particles observed over a long distance in the crystal lattice.
• C. same arrangement of constituent particles in different directions.
• D. different arrangements of constituent particles in different directions.

Answer 1

The correct option is B a regular arrangement of constituent particles observed over a long distance in the crystal lattice.

A solid is said to be crystalline, if the various constituent structural units (atoms, ions or molecules) of which the solid is made, are arranged in a definite geometrical pattern over a long range in the crystal lattice.

Due to this long range ordered arrangement of constituent particles, crystalline solids shows sharp melting point.

Hence, option $\left(B\right)$ is the correct answer.