Question:
Which of the following point defects are shown by AgBr crystals? I. Metal excess defect, II. Schottky defect, III. Metal deficiency defect, IV. Frenkel defect
Which of the following point defects are shown by AgBr crystals? I. Metal excess defect, II. Schottky defect, III. Metal deficiency defect, IV. Frenkel defect
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AgBr is the "dual-defect" crystal—it shows both Frenkel and Schottky defects!
Updated On: Jun 6, 2026
- I & II
- II & IV
- I, II & III
- I & IV
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Defects in crystals.
Step 2: Meaning
AgBr is a well-known example that exhibits both Schottky and Frenkel defects.
Step 3: Analysis
Schottky and Frenkel are intrinsic defects (II and IV). Metal excess/deficiency defects are non-stoichiometric.
Step 4: Conclusion
AgBr crystals show both Schottky and Frenkel defects.
Final Answer: (B)
Defects in crystals.
Step 2: Meaning
AgBr is a well-known example that exhibits both Schottky and Frenkel defects.
Step 3: Analysis
Schottky and Frenkel are intrinsic defects (II and IV). Metal excess/deficiency defects are non-stoichiometric.
Step 4: Conclusion
AgBr crystals show both Schottky and Frenkel defects.
Final Answer: (B)
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