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

Classify the following as amorphous or crystalline solids:Polyurethane

1.	Classify the following as amorphous or crystalline solids:Polyurethane, naphthalene, benzoic acid , teflon , potassium niturate, cellophone, polyvinyl chloride , fibre glass, copper.
Answer» Solution :Amorphous solids, polyurethane, TEFLON, cellophone, POLYVINYL chloride, fibre GLASS, Crystalline solids:BENZOIC acid, potassium nitrate , copper.