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प्रश्न
Answer the following question.
What type of stoichiometric defect is shown by ZnS and why?
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उत्तर
The stoichiometric defect shown by ZnS is Frenkel defect which is due to the large difference in the size of the ions, i.e. due to the small size of Zn2+.
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संबंधित प्रश्न
Explain the following term with suitable examples:
Frenkel defect
Silver halides generally show:
Schottky defect is observed in crystals when ______.
Which of the following defects is also known as dislocation defect?
Which of the following statements are not true?
(i) Vacancy defect results in a decrease in the density of the substance.
(ii) Interstitial defects results in an increase in the density of the substance.
(iii) Impurity defect has no effect on the density of the substance.
(iv) Frankel defect results in an increase in the density of the substance.
Which of the following defects decrease the density?
(i) Interstitial defect
(ii) Vacancy defect
(iii) Frankel defect
(iv) Schottky defect
Why is FeO (s) not formed in stoichiometric composition?
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion: In any ionic solid (MX) with Schottky defects, the number of positive and negative ions are same.
Reason: Equal number of cation and anion vacancies are present.
Given below are two statements:
Statements I: Frenkel defects are vacancy as well as interstitial defects.
Statements II: Frenkel defect leads of colour in ionic solids due to the presence of F-centers.
Choose the most appropriate answer for the statements from the options given below:
Which type of ‘defect’ has the presence of cations in the interstitial sites?
