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Question

Which are amorphous solids?

A
Sodium chloride
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B
Calcium flouride
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C
Glass
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D
Plastics
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Solution

The correct options are
B Glass
D Plastics
Amorphous solids are the substances whose constituent particles do not possess a regular orderly arrangement.

They have isotropic nature and melt over a range of temperature. They are sometimes called pseudo solids or super cooled liquids. They do not have definite enthalpy of fusion.

Examples of amorphous solids are glass, rubber and plastic.

Hence, option C and D are correct.

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