KCET · Chemistry · Coordination Compounds

The correct statement regarding defect in solids is

A Frenkel defect is usually favoured by a very small difference in the sizes of cations and
anions.
B Frenkel defect is a dislocation defect.
C Trapping of proton in the lattice leads to the formation of F-centers
D Schottky defect has no effect on the physical properties of solids

Verified Solution

Answer & Solution

Correct Answer

(B) Frenkel defect is a dislocation defect.

Step-by-step Solution

Detailed explanation

Option (1): Frenkel defect occurs in compounds in which (i) coordination number is low (ii) anions are much larger in size
than cations.
Option (2): Frenkel defect arises when an ion is dislocated from its normal position causing a vacancy or a hole and
occupied an interstitial site between the lattice points.
Option (3): The electrons trapped in anion vacancies are referred as F-centers so trapping of electrons takes place and
not protons.
Option (4): Because of presence of large no. of vacancies in crystals in Schottky defects its density is markedly lowered.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Explore more questions on app

From KCET

Explore more questions on app