The incorrect statement among the following is -
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 cations and anions have large difference. |
4. | \(Fe_{0.98}O\) has non stoichiometric metal excess defect. |
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