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Question
non-stoichiometric defects?
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Solution
The defect shown by NaCl in non-stoichiometric defect is metal excess defect due to anionic vacancies which is known as F-centre.
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RELATED QUESTIONS
Give reasons : In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect.
Examine the given defective crystal:
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(i) What type of stoichiometric defect is shown by the crystal?
(ii) How is the density of the crystal affected by this defect?
(iii) What type of ionic substances show such defect?
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Dislocation defect is also known as ____________.
Schottky defect is observed in crystals when ______.
Which of the following defects is also known as dislocation defect?
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(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.
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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?
