Solid State
Which of the following statement(s) for crystals having Frenkel defect is/are correct?
Due to Frenkel defect, the density of ionic solids :
In Frenkel defect, the cation just leaves its position and shifts to another position in the unit cell or lattice but does not leave the crystal. So, no change in mass and volume takes place and hence, there is no change in density.
Which of the following statement(s) for crystals having Frenkel defect is/are correct?
The correct statement(s) regarding defects in solids is(are):
Which of the following is a correct statement regarding defects in crystalline solids?
Which among the following solids shows Frenkel defect?
Frenkel defects are not found in alkali metal halide. Why?
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.
Density of a crystal decreases due to Schottky defect and remains constant due to Frankel defect. If true enter 1,else enter 0.
Frenkel defect does not change the density of the ionic crystal whereas, Schottky defect lowers the density of ionic crystal. Give a reason.