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24/12/2021 12:58 pm
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S1: Frenkel defect is interstitial as well as vacancy effect.
S2: In Frenkel defect, solids show colour because of F-centre.
(a) Both S1 and S2 are correct.
(b) S1 is correct but S2 is incorrect.
(c) S1 is incorrect but S2 is correct.
(d) Both S1 and S2 are incorrect.
1 Answer
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24/12/2021 12:59 pm
Correct answer: (b) S1 is correct but S2 is incorrect.
Explanation:
In Frenkel Defect the smaller ion (usually cation) is dislocated from its normal site to an interstitial site. It creates a vacancy defect at its original site and an interstitial defect at its new location. F-centres are shown by crystals showing metal excess defect.