(C) Statement $I$ is true because in a Frenkel defect,an ion leaves its lattice site (creating a vacancy) and occupies an interstitial site.Statement

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Statement $I$ is true but Statement $II$ is false

(C) Statement $I$ is true because in a Frenkel defect,an ion leaves its lattice site (creating a vacancy) and occupies an interstitial site.Statement $II$ is false because the colour in ionic solids due to $F$-centres is a characteristic of metal excess defects (specifically anion vacancies),not Frenkel defects.Therefore,Statement $I$ is true but Statement $II$ is false.

Class 12 Chemistry Solid State Defects in crystal

Difficult

Given below are two statements.
Statement $I:$ Frenkel defects are vacancy as well as interstitial defects.
Statement $II:$ Frenkel defect leads to colour in ionic solids due to presence of $F$-centres.
Choose the most appropriate answer for the statements from the options given below:

JEE MAIN 2021 All JEE MAIN

A
Statement $I$ is false but Statement $II$ is true
B
Both Statement $I$ and Statement $II$ are true
C
Statement $I$ is true but Statement $II$ is false
D
Both Statement $I$ and Statement $II$ are false

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Given below are two statements.Statement $I:$ Frenkel defects are vacancy as well as interstitial defects.Statement $II:$ Frenkel defect leads to colour in ionic solids due to presence of $F$-centres.Choose the most appropriate answer for the statements from the options given below:

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Given below are two statements.
Statement $I:$ Frenkel defects are vacancy as well as interstitial defects.
Statement $II:$ Frenkel defect leads to colour in ionic solids due to presence of $F$-centres.
Choose the most appropriate answer for the statements from the options given below:

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$Na^{+} \, Cl^{-} \, Na^{+} \, Cl^{-} \, Na^{+} \, Cl^{-}$
$Cl^{-} \, \Box \, Cl^{-} \, Na^{+} \, \Box \, Na^{+}$
$Na^{+} \, Cl^{-} \, \Box \, Cl^{-} \, Na^{+} \, Cl^{-}$
$Cl^{-} \, Na^{+} \, Cl^{-} \, Na^{+} \, \Box \, Na^{+}$