Question

This section contains questions each with two columns-I and II. Match the items given in column I with that in column II.

Answer 1

(A) Departure from regularity in the arrangement of constituent particles in a crystal is known as defect or imperfection.
(B) Cubic crystal is exemplified by zinc blende.
(C) Glass and fused silica are examples of amorphous solid.
(D) Tetrahedral geometry is shown by $Si{O}_4$ units.