Classify the following as amorphous or crystalline solids: Polyurethane, naphthalene, benzoic acid, teflon, potassium nitrate, cellophane, polyvinyl chloride, fibre glass, copper.
SUBSTANCE | TYPE OF SOLID |
Polyurethane | amorphous solid |
Naphthalene | crystalline solid |
Benzoic acid | crystalline solid |
Teflon | amorphous solid |
Potassium nitrate | crystalline solid |
Cellophane | amorphous solid |
Polyvinylchloride | amorphous solid |
Fibre glass | amorphous solid |
Copper | crystalline solid |
Explanation: Amorphous solids are not true solids, in these solids the constituent particles (atoms, ions or molecules) have short range order of arrangement.
In crystalline solids the constituent particles have long range order of arrangement)