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The sharp melting point of crystalline s...

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

A

A regular arrangement of constituent particles observed over a short distance in the crystal lattice

B

A regular arrangement of constituent particles observed over a long distance in the crystal lattice

C

Same arrangement of constituent particles in different directions

D

Different arrangement of constituent particles in different directions

Text Solution

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The correct Answer is:
B
Crystalline solid has regular arrangement of constituent particles observed over a long distance in the crystal lattice. Due to this regular arrangement crystalline solid have sharp melting point.
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Solids have properties like rigidity a definite shape and a define volume. If intermolecular forces are greater than thermal energy, substances exist as solid. Solids can be classified into two types. Crystalline solids and amorphous solids, Crystalline solids have regular arrangement of particles, definite geometric shapes, sharp melting points and definite heat of fusion. They are anisotropic and undergo clean cleavage. On the other hand, amorphous solid have no regular arrangement of particles, irregular shapes, melt over a range of temperature, no definite heat of fusion. They are isotropic and undergo irregular cleavage. The melting point of crystalline solids is sharp due to:

Crystalline solid are

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