Question
Define Anisotropy. Distinguish between crystalline solids and amorphous solids.

Answer

The ability of crystalline solids to change values of physical properties when measured in different directions is called anisotropy.
Crystalline solidAmorphous solid
(i)They have a definite geometrical shapeThey have an irregular shape
(ii)They have a sharp melting pointThey melt over a range of temperature
(iii)They are anisotropicThey are isotropic
(iv)They are pure solidThey are supercooled liquid.
(v)They have long-range order of regular pattern of arrangement of constituent particles.They have short-range order of regular pattern of arrangement of constituent particles.
(vi)They have definite heat of fusion.They do not have a definite heat of fusion.

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