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Assertion: In frekel defect in an ionic ...

Assertion: In frekel defect in an ionic crystal, an ion is dispalced from its normal site to an interstitial site.
Reason: There is both a vacancy and an intersitial ion.

A

Statement -1 is True, Statement -2 is true : Statement -2 is a correct explanation for Statement -8

B

Statement -1 is True, Statement -2 is True , Statement -2 is NOT a correct explanation for Statement -8

C

Trapped eletrons

D

Statement -1 and Statement -2 both are False

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Any deviation from the perfectly ordered arrangement constitutes a defect or imperfection. The compounds in which the number of irregularity are present in the arrangement of atoms or ions are called atomic imperfections or point defects. These may be stochiometric or non - stoichlometric. Stoichiometric defects are further classified into Schottky defects in which number of positive and negative ions are missing in equal ratio and Frenkel defects in which an ion leaves its correct lattice sites and occupies on interstitial site. Schottky defect is more common in ionic compounds with high co-ordination number and where the size of positive and negative ions are almost equal, while in Frenkel defects are common in ionic compounds, which have low co-ordination number and in which there is large difference in size between positive and negative ions. In a crystal some ions are missing from normal sites. This is an example of

Any deviation from the perfectly ordered arrangement constitutes a defect or imperfection. The compounds in which the number of irregularity are present in the arrangement of atoms or ions are called atomic imperfections or point defects. These may be stochiometric or non - stoichlometric. Stoichiometric defects are further classified into Schottky defects in which number of positive and negative ions are missing in equal ratio and Frenkel defects in which an ion leaves its correct lattice sites and occupies on interstitial site. Schottky defect is more common in ionic compounds with high co-ordination number and where the size of positive and negative ions are almost equal, while in Frenkel defects are common in ionic compounds, which have low co-ordination number and in which there is large difference in size between positive and negative ions. When an ion leaves ir correct lattice and occupies interstital sites in its crystal lattice, it is called

The defect when an ion occupies an interstitial position in the crystal lattice is called

GRB PUBLICATION-SOLID STATE-All Questions
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  2. Assertion : In point defect density of solid maydecrease and increase ...

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  3. Assertion: In frekel defect in an ionic crystal, an ion is dispalced f...

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  4. Statement -1 An ionic structure is composed of oppositely charged ions...

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  5. Statement -1 Radius ratios provide a rough idea to what structures are...

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  6. Statement -1 Crystal defect are saomtimes called thermodnamic defect ...

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  7. Statement -1 The energy needed to from a Schottly defect is usually le...

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  8. Statement -1 Generally cation go to void and anion from the lattice ...

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  9. Statement -1 In HCP structure the contribution of hexagonal face corne...

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  10. Statement-1 C.N of Cs^(+) ion in CsCl structure is 8 Statement -2 C...

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  11. Statement -1 In BCC structure, the corrdination number of nearest neih...

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  12. Statement -1 All crystal have defect Statement -2 Sometimes vacancis...

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  13. Statement -1 If alphais the unit cell length of a cubic lattice, the a...

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  14. Statement -1 The erutile structure is not close packes Statement -2 ...

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  15. Statement -1 At absolute zero, crystal tend to have a perfectly ordere...

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  16. Statement -1 Migration to the smaller ion usually the cation into the ...

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  17. Which of the following crystal will have at least two axial angle 90^(...

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  18. An ionic compound consists of only A^9+1),B^(+2)and C^(-3) ions Which ...

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  19. Which of the following statements is/are correct with respect to cryst...

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  20. Which of the following options(s) is/are incorrect with respect to cub...

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