Question

Assertion :$KCl$ is more likely to show the Schottky defect, while $Li$ is more likely to show Frenkel defect. Reason: The schottky defect is found in those ionic solid which have cation and anion of similar size while Frenkel defect is more likely found in those solids which have the cation of smaller size.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

$KCl$ is more likely to show Schottky defect as the size of $K^{+}$ and $C{l}^{-}$ are comparable which is found in the Schottky defect.

While Frenkel defect is found where the size of the cation is smaller than anion.

In $LiCl$ the size of $L{i}^{+}$ ion is very small as compared to the size of $C{l}^{-}$ ion. Thus, it shows a Frenkel defect.

So, Assertion and reason both are correct and the reason is the correct explanation.