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

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

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

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

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

Classify the following as amorphour or crystalline solids: Polyurethane, nephthalene, benzoic, acid, teflon, potassium nitrate, cellphane, polyviny chloride, fibre glass, copper.