1.

Classify the following as amorphous or crystalline solids. Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.

Answer»

Crystalline solids: Naphthalene, benzoic acid, potassium nitrate, copper.

Amorphous solids: Polyurethane, teflon, polyvinyl chloride, fibre glass, cellophane.



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