Which is the incorrect statement ?(1) Density decreases in case of crystals with Schottky's defect(2) NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal(3) Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal(4) FeO0.98 has non stoichiometric metal deficiency defect

Which is the incorrect statement ?(1) Density decreases in case of cry

1.	Which is the incorrect statement ?(1) Density decreases in case of crystals with Schottky's defect(2) NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric crystal(3) Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal(4) FeO0.98 has non stoichiometric metal deficiency defect
Answer» (3, 4) Those ionic compounds in which size of cation and anion is largely different show Frenkel defect. Non-stoichiometric ferrous oxide is Fe_0.93–0.96O_1.00 and it is due to metal deficiency defect.

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