Year: 2017
Topic: Chemistry-Out Of Syllabus
Time :
1.
Which is the incorrect statement ?
(1). Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal.
(2). FeO
0.98
has non stoichiometric metal deficiency defect.
(3). Density decreases in case of crystals with Schottky's defect.
(4). NaCl(s) is insulator, silicon is semi-conductor, silver is conductor, quartz is piezo electric crystal.