Amorphous Solids MCQ

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• Crystallinity increases with increasing rate of cooling of a liquid.
  ক

  True

  খ

  False
• Lead-oxide glass is called “crystal glass” because:
  ক

  It contains crystalline Pb

  খ

  It contains SiO2 crystals

  গ

  It contains PbO crystals

  ঘ

  None of the mentioned
• Soda-lime glass is the most common type of glass. The component present in largest w/w percentage is:
  ক

  SiO2

  খ

  Al2O3

  গ

  Na2O

  ঘ

  CaO
• Consider the following cooling diagram for an amorphous solid. Glass-transition temperature is represented as:
  ক

  A

  খ

  B

  গ

  C

  ঘ

  None of the mentioned
• Metal glasses differ from their crystalline counterparts in many ways. Chief application(s) of metal glasses include(s):
  ক

  Bullet-proof glasses

  খ

  Power transformers

  গ

  Conducting wires

  ঘ

  All of the mentioned
• Polycrystalline solids are isotropic.
  ক

  True

  খ

  False
• Metal glass was first prepared at:
  ক

  California Institute of Technology

  খ

  Massachusetts Institute of Technology

  গ

  Technion

  ঘ

  University of Michigan
• Which of the following properties is generally exhibited by amorphous solids?
  ক

  Anisotropy

  খ

  Glass-transition

  গ

  Equal strength of all bonds

  ঘ

  All of the mentioned