Which of these is a typical crystalline solid?
ACommon plastic
BSodium chloride
COrdinary glass
DNatural rubber
Answer & Solution
Correct answer: B. Sodium chloride
1. Glass, rubber and plastics do not form crystals on cooling.
2. Two typical crystalline solids are named together.
3. Sodium chloride is one of them.
_Source: syllabus Chemistry Part I, Chapter 1, The Solid State._
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