Assertion:Frenkel defect is also called dislocation defect
Reason:Frenkel defect is shown by ionic substances in which cation and anion are of almost similar sizes.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer

C

Explanation

Frenkel defect is called dislocation defect because smaller ion ( generally the cation) is dislocated from its normal site to an interstitial site . It is shown by ionic substances in which there is large difference in the size of ions e.g. ZnS, AgCl