Question

Below are two statements:

Statement I: Frenkel defect provides colour in a solid.

Statement II: Frenkel defect is an interstitial defect.

• A. Statement I is correct, and statement II is correct.
• B. Statement I is correct, and statement II is incorrect.
• C. Statement I is incorrect, and statement II is incorrect.
• D. Statement I is incorrect, and statement II is correct

Answer 1

The correct option is C

Statement I is incorrect, and statement II is incorrect.

The Explanation for the Frenkel defect provides color in a solid:

Ionic solids show Frenkel defects. Generally color arises due to F-centre in ionic solid, not for Frenkel defects.

The Explanation for the Frenkel defect is an interstitial defect:

The Frenkel defect (also known as the Frenkel pair/disorder) is a defect in the lattice crystal where an atom or ion occupies a normally vacant site and instead occupies a normally vacant site so it is a dislocation defect and not an interstitial defect.

So, Statement I is incorrect and statement II is incorrect.

Hence, Option(C) is correct.