Given below are two statements : Statement-I : Frekel defects are vacancy as well as interstitial defects. Statement-II : Frenkel defect leads to colour in ionic solids due to presence of F-centres. C

Question

Given below are two statements : Statement-I : Frekel 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 :

(A) Both Statement-I and Statement-II are false
(B) Statement-I is true but Statement-II is false
(C) Statement-I is false but Statement-II is true
(D) Both Statement-I and Statement-II are true uhps nks dFku fn, gSaA dFku-I : Ýsadsy nks"k fjfDrrk rFkk vUrjkdk'kh nks"k gSA dFku-II : Ýsadsy nks"k] F-dsUnzksa dh mifLFkr ds dkj.k] vk;fud Bkslksa esa jx mRiUu djrk gSA mijksDr dFkuksa ds lanHkZ esa uhps fn, fodYiksa esa ls lgh mÙkj pqfu,A (1) nksuksa dFku-I rFkk dFku-II vlR; gSA (2) dFku-I lR; gS ijUrq dFku-II vlR; gSA (3) dFku-I vlR; gS ijUrq dFku-II lR; gSA (4) nksuksa dFku-I rFkk dFku-II lR; gSA

Prashant Kotian · Accepted Answer

Correct answer: B. Frenkel defect is dislocation defect, it is not interstitial defect and it is not responsible for colour of solid. Note : NTA ans. is (2), But Reso ans. Is (1).

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