question_answer 57)

  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 arrangement of constituent particles in different directions

Answer:

                  (b) Crystalline solid has regular arrangement of constituent particles observed over a long distance in the crystal lattice. Due to this regular arrangement crystalline solid have sharp melting point.