Question

In stoichiometric defects, the types of compound exhibit Frenkel defects have/has
(a) Low co-ordination nos.
(b) High co-ordination.
(c) Small difference in the size of cations and anions
(d) None of these.

Answer 1

b and c I think plz give me correct answer

Answer 2

The compounds that have Low Coordination numbers tend to exhibit Frenkel defects. (a is the correct option)

• In the event that a particle is missing from its right lattice site causing a vacancy or a hole and possesses an interstitial site, electrical neutrality, and the stoichiometry of the compound, are kept up with. This sort of deformity is called Frenkel defect.  
• Since cations are generally smaller it is more considered normal to find the cations involving interstitial locales.  
• Frenkel defect is otherwise called dislocation effect.
• It can be found in ionic compounds where -

        (i) Coordination number is low.

        (ii) Difference between cationic and anionic size is large.

        (iii) The cation has high polarity while the anion is easily polarizable.

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