Single Choice

Which of the following is a correct statement regarding defects in crystalline solids?

AFrenkel defect is a dislocation defect.
Correct Answer
BFrenkel defect is a found in halides of alkaline metals.
CSchottky defects have no effect on the density of crystalline solids.
DFrenkel defects decrease the density of crystalline solids.

Solution

(A) Frenkel defect is a dislocation defect. It arises due to a vacancy at cationic site. The cation moves to another position between the two layers and is surrounded by greater number of anions.
(B) Frenkel defect is a found in ZnS, AgBr, AgI, AgCl etc.
(C) Due to Schottky defects, the density of crystals decreases.
(D) Frenkel defects have no effect on the density of crystalline solids.

SIMILAR QUESTIONS

Solid State

Due to Frenkel defect, the density of ionic solids :

Solid State

Which of the following statement(s) for crystals having Frenkel defect is/are correct?

Solid State

The correct statement(s) regarding defects in solids is(are):

Solid State

Which among the following solids shows Frenkel defect?

Solid State

Frenkel defects are not found in alkali metal halide. Why?

Solid State

Give the correct order of initials T (true) or F (False) for following statements: I. In an anti-fluorite structure, anions form FCC lattice and cations occupy all tetrahedral voids. II. If the radius of cations and anions are $$0.2\ \mathring A$$ and $$0.95\ \mathring A$$, then co-ordination number of cation in the crystal is $$4$$. III. An ion is transferred from a lattice site to an interstitial position in Frenkel defect. IV. Density of crystal always increases due to substitutional impurity defect.

Solid State

Density of a crystal decreases due to Schottky defect and remains constant due to Frankel defect. If true enter 1,else enter 0.

Solid State

Frenkel defect does not change the density of the ionic crystal whereas, Schottky defect lowers the density of ionic crystal. Give a reason.

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