question_answer 99)

  Which of the following features are not shown by quartz glass? (a) This is a crystalline solid (b) Refractive index is same in all the directions (c) This has definite heat of fusion (d) This is also called super cooled liquid

Answer:

                  (a, c) Quartz glass is an amorphous solid so it has not definite heat of fusion. This is due to short range order of molecule while quartz glass is also known as super cooled liquid and isotropic in nature.