Statement-I: – Frenkel defect is shown by the ionic solids when cation and anion have almost similar sizes.Statement-II: – ZnO is yellow at room temperature
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a
Both Statement-I and II are correct
b
Statement-I is correct and Statement-II is incorrect
c
Statement-I is incorrect and Statement-II is correct
d
Both Statement-I and II are incorrect
answer is D.
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Detailed Solution
Frenkel defect is observed when ther is a large difference in ionic sizes of cation and anion-Silver halides, ZnO, ZnSZnO – White when cold and yellow when hot.
Statement-I: – Frenkel defect is shown by the ionic solids when cation and anion have almost similar sizes.Statement-II: – ZnO is yellow at room temperature