Classify the following as amorphous or crystalline solids: Polyurethane,
naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl
chloride, fibre glass, copper. Give reasons for your answer.

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Solution

Following are the amorphous and these do not have any specific shape...
Polyurethane,teflon,cellophane,polyvinyl chloride,fibre glass.
Rest of all are crystalline solids:
naphthalene, benzoic acid,potassium nitrate and copper.

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Classify the following as amorphous or crystalline solids:

Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

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