1.

Which of the following is not a characteristic of a crystalline solid?

Answer»

Definite and characteristic heat of fusion. 
Isotropic nature. 
A regular periodically REPEATED PATTERN of arrangement of constituent particles in the ENTIRE crystal. 
A true solid 

Solution :Crystalline solids are anisotropic that is some of their physical properties like electrical resistance or refractive index show DIFFERENT values when measured along different directions of same crystal. This arises from the different arrangement of atoms along different directions.


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