Question

Choose the correct option(s)
Crystalline solids do not have/show:

• A. a definite latent heat of fusion.
• B. irregular atomic arrangement
• C. polymorphism
• D. free movement of atoms or ions

Answer 1

Answer: (B), (D)

free movement of atoms or ions

Crystalline solids consist of large number of crystals, each of which has well-defined regular shape such as a cube, octahedron or tetrahedron.
Thus, crystalline solids do not have irregular atomic arrangements.

Due to long range ordered arrangement, they show sharp melting point, latent heat of fusion and they can be cut clean along specific crystal planes.



Crystalline solid shows polymorphism. They have different crystalline structures of the same substance, in different conditions.​

Crystalline solids have regular arrangements of atoms, and all the constituents are closely packed, they have little intermolecular space in between them so they are not free to move.

Thus, options (b) and (d) are correct answers.