Imperfection in Ceramics MCQ

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• Transition metal oxides are highly defective.
  ক

  True

  খ

  False
• Which of the following does point defect does not depend on?
  ক

  Density

  খ

  Melting point

  গ

  Hardness

  ঘ

  Optical absorb
• In which of the following the concentration of defect increases with temperature increase?
  ক

  Point defect

  খ

  Intrinsic defect

  গ

  Extrinsic defect

  ঘ

  Linear defect
• In which of the following the concentration of defect is constant?
  ক

  Point defect

  খ

  Intrinsic defect

  গ

  Extrinsic defect

  ঘ

  Linear defect
• In which of the following iron compounds, the compound is non-stoichiometric?
  ক

  Fe2+ and Fe3+

  খ

  Fe2+ ion only

  গ

  Fe3+ ion only

  ঘ

  It doesn’t depend on the iron ions
• Frenkel defects change the ratio of cation to anions.
  ক

  True

  খ

  False
• Schottky and Frenkel defects are __________
  ক

  interstitial and vacancy defects respectively

  খ

  vacancy and interstitial defect respectively

  গ

  interstitial defects

  ঘ

  vacancy defects