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MHT CET202521 Apr 2025Evening ShiftChemistrySolid StateActual

Identify the defect developed when an ion of an ionic compound is missing from its regular site and occupies interstitial position between lattice points

Options

  1. ASchottky defect
  2. BFrenkel defect
  3. CSubstitutional impurity defect
  4. DInterstitial impurity defect

Correct answer

B. Frenkel defect

Step-by-step solution

Frenkel defect describes a crystal lattice imperfection where an ion leaves its regular site, creating a vacancy, and occupies an interstitial position. This maintains electrical neutrality as the displaced ion remains within the crystal structure. Given the definition matches option B precisely, the correct answer is B .

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