1.

The sharp melting point of crystalline solids is due to …….

Answer»

a regular ARRANGEMENT of constituent PARTICLES observed over a short distance in the CRYSTAL LATTICE.
a regular arrangement of constituent particles observed over a long distance in the crystal lattice. 
same arrangement of constituent particles in DIFFERENT directions.
different arrangement of constituent particles in different directions.

Solution :In crystalline solids the constituent particles are arranged in a definite geometrical pattern as a result the type of forces in crystalline solids are of long range order due to which it has sharp melting points.


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