Which from the following statements is NOT true regarding crystalline solid?
Which from the following statements is NOT true regarding crystalline solid?
There is a regularity and periodicity in arrangement of constituent particles.
It is isotropic.
It melts at definite temperature.
It has different magnitudes for refractive index in every direction.
Solution
All crystalline substances except those having cubic structure are anisotropic, i.e., their properties like refractive index, thermal and electrical conductivity, etc., are different in different directions.