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Assertion. No compound has both Schottky...

Assertion. No compound has both Schottky and Frenkel defects.
Reason. Both defects change the density of the soild .

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true but reason is false

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
D
Certain ionic solids (for example, AgBr ) have both Schottky and Frenkel defects. Only Schottky defects change the density of solids because anions or cations are missing and Frenkel defects have no change in density because they have same number of cations or anions, only change the position of ions.
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In Frenkel defect

Assertion :No compound has both schottky and frenkel defect Reason : schottky defect change the density of the solid

Which has Frenkel defect ?

Schottky defect.

In what way, do Schottky and Frenkel defects differ from each other ?

Assertion (A) Both Frenkel and Schottky defects are stoichiometric defects. Reason (R ) Both defects change the density of the crystalline solid.