Question

Which of the following is not a characteristic of a crystalline solid?
(a) Definite and characteristic heat of fusion
(b) Isotropic nature
(c) A regular periodically repeated pattern of arrangement of constituent particles in the entire crystal
(d) A true solid

Answer 1

c) a regular periodically repeatetd pattern of arrangement of constituents particles in the entire crystal

Answer 2

Answer:

(b) Isotropic nature

Explanation:

A crystalline solid is anisotropic in nature and not isotropic. The solid is anisotropic as this solid exhibits different physical properties such as the electrical resistance, and the refractive index in different directions. Both the isotropic and anisotropic properties are related to the amorphous solid and crystalline solid which can be clearly understood as -

Property - Isotropy and  Anisotropy

Types of solid - Amorphous solid and Crystalline solid

Physical properties  - Same value and Different values

Thus, statement (b) Isotropic nature is incorrect.