Correct option is 1changes abruptly from solid to liquid when heated

A crystalline solid

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changes abruptly from solid to liquid when heated

has no definite melting point

undergoes deformation of its geometry easily

has an irregular 3-dimensional arrangements

answer is A.

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Detailed Solution

In crystalline solid there is perfect arrangement of the constituent particles only at 0K. As the temperature increases the chance that a lattice site may be unoccupied by an ion increases. As the number of defects increases with temperature solid changes to liquid.

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