Which of the following statements are not correct?
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a
Crystalline solids have definite heat of fusion whereas amorphous solids lack it.
b
Crystalline solids have definite geometrical shape whereas amorphous solids have no definite shape
c
Crystalline solids are anisotropic whereas amorphous solids are isotropic.
d
Crystalline solids do not have sharp melting point whereas amorphous solids have sharp melting point
answer is D.
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Detailed Solution
(a,b,c) Crystalline solids have definite heat of fusion, definite geometrical shape, sharp melting point and are anisotropic while amorphous solids are isotropic and these properties are not definite in their case.