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 amorphours or crystalline solids: Naphthalene Teflon Polyurethane Benzoic acid Potassium nitrate Cellophane Polyvinyl chloride Fibre glass Copper Zinc sulphide.

Raman and Rajan were studying the properties of solids. A solid 'X' showed same physical properties (thermal conductivity and refractive index) in all directions while another solid 'Y' showed differrent physical properties in different directions. Raman classified the solid 'X' as crystalline and solid 'Y' as amorphous. Rajan did not agree with Raman's classification. Answer the following questions What is the natme of the property exhibited by solid 'X'?

Raman and Rajan were studying the properties of solids. A solid 'X' showed same physical properties (thermal conductivity and refractive index) in all directions while another solid 'Y' showed differrent physical properties in different directions. Raman classified the solid 'X' as crystalline and solid 'Y' as amorphous. Rajan did not agree with Raman's classification. Answer the following questions Whom do you favour, Raman or Rajan and why?