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Which of the Following is an Amorphoussolid?

  • A.Quartz glass (SiO2)
  • B.Chrome alum
  • C.Silicon carbide (SiC)
  • D.Graphite

Answer: A

Quartz glass is amorphous.

It has short-range order but no long-range periodicity, so it has no sharp melting point and its properties are the same in all directions. Chrome alum, silicon carbide and graphite are all crystalline, with regularly repeating lattices.

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