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Schottky defects are observed in solids with cations and anions of similar sizes. Which of the following compounds, therefore, is NOT likely to have a Schottky defect?
- a)NaCl
- b)AgCl
- c)CsCl
- d)KCl
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Schottky defects are observed in solids with cations and anions of sim...
There is a considerable size difference between Ag cation and Cl anion. Hence a Frenkel defect is more likely to occur than a Schottky defect.
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Schottky defects are observed in solids with cations and anions of sim...
Explanation:
Schottky Defects:
Schottky defects are observed in ionic solids where cations and anions are of similar sizes, leading to the creation of vacancies in both cation and anion sublattices.
Analysis of Compounds:
- NaCl: Sodium chloride (NaCl) is a compound with cations (Na+) and anions (Cl-) of similar sizes, making it likely to exhibit Schottky defects.
- AgCl: Silver chloride (AgCl) has a relatively large silver (Ag+) cation compared to the chloride (Cl-) anion, making it less likely to have Schottky defects due to the size mismatch.
- CsCl: Cesium chloride (CsCl) has cations (Cs+) and anions (Cl-) of similar sizes, making it a good candidate for Schottky defects.
- KCl: Potassium chloride (KCl) also has cations (K+) and anions (Cl-) of similar sizes, making it likely to exhibit Schottky defects.
Conclusion:
Based on the analysis, the compound that is NOT likely to have a Schottky defect is AgCl due to the size mismatch between Ag+ cations and Cl- anions. The other compounds, NaCl, CsCl, and KCl, are more likely to exhibit Schottky defects because of the similar sizes of their cations and anions.
Schottky Defects:
Schottky defects are observed in ionic solids where cations and anions are of similar sizes, leading to the creation of vacancies in both cation and anion sublattices.
Analysis of Compounds:
- NaCl: Sodium chloride (NaCl) is a compound with cations (Na+) and anions (Cl-) of similar sizes, making it likely to exhibit Schottky defects.
- AgCl: Silver chloride (AgCl) has a relatively large silver (Ag+) cation compared to the chloride (Cl-) anion, making it less likely to have Schottky defects due to the size mismatch.
- CsCl: Cesium chloride (CsCl) has cations (Cs+) and anions (Cl-) of similar sizes, making it a good candidate for Schottky defects.
- KCl: Potassium chloride (KCl) also has cations (K+) and anions (Cl-) of similar sizes, making it likely to exhibit Schottky defects.
Conclusion:
Based on the analysis, the compound that is NOT likely to have a Schottky defect is AgCl due to the size mismatch between Ag+ cations and Cl- anions. The other compounds, NaCl, CsCl, and KCl, are more likely to exhibit Schottky defects because of the similar sizes of their cations and anions.
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Schottky defects are observed in solids with cations and anions of similar sizes. Which of the following compounds, therefore, is NOT likely to have a Schottky defect?a)NaClb)AgClc)CsCld)KClCorrect answer is option 'B'. Can you explain this answer?
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