Which of the following statements is/are true ? i) Density of solid gets increased due to interstitial defects ii) Frenkel defects do not alter the density of the solid iii) Non-stoichiometric defects modify the formula of the compound
iv) Non-stoichiometric defects do not alter the density of the solid
A
i, ii & iii
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B
ii & iii
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C
i, iii & iv
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D
i& iii
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Solution
The correct option is A
i, ii & iii
Except Frenkel defect in all other imperfections, ions may be missing from the crystals or extra ions may occupy interstitial sites changes density of crystals