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When anion leaves the normal lattice sit...

When anion leaves the normal lattice site and electron occupies interstitial sites in its crystal lattice, It is called:

A

Crystal defect

B

Frenkel defect

C

Schottky defect

D

None of these

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The correct Answer is:
B
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The defect when an ion occupies an interstitial position in the crystal lattice is called

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. Which of the following defect, if present, lowers the density of the crystal ?

Ionic lattic has two major points defects ,(1) Schottky (2) Frenkel defects . Schottkly defects occurs due to the cations - anion pair's missing from the lattice sites . Frenkel defects occurs when cation leaves its lattice site and fits into an interstitial space. The neutrality of the crystal is being maintained and we considered all losses from interstitial positions. which defect decrease density of the crystal ?

In AgCl , the Ag^(o+) ions are deisplaced from their lattice position to an interstitial position. Such a defect is called

Ionic lattic has two major points defects ,(1) Schottky (2) Frenkel defects . Schottkly defects occurs due to the cations - anion pair's missing from the lattice sites . Frenkel defects occurs levels its lattic site and fits into an intersitial space. The neturaity of the crystal is benig maintained and we considerd all losses from interstitical positions. Structure shown here represents :

Ionic lattic has two major points defects ,(1) Schottky (2) Frenkel defects . Schottkly defects occurs due to the cations - anion pair's missing from the lattice sites . Frenkel defects occurs levels its lattic site and fits into an intersitial space. The neturaity of the crystal is benig maintained and we considerd all losses from interstitical positions. Structure shown here represents :

The lattice site in a pure crystal cannot be occupied by

Which inactivates an enzyme by occupying its active site ?

Among the following in which hydrates H_(2)O molecules only occupy the interstitial site

VMC MODULES ENGLISH-THE SOLID STATE-EFFICIENT
  1. An element with molecular weight 200 gm/mole crystallizes in a s...

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  2. CsCl has bc c arrangement and its unit cell edge length is 400 pm. Cal...

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  3. In the face centered cubic unit cell, the radius of atoms in terms of ...

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  4. The number of atoms present in a hexagonal close-packed unit cell is:

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  5. In a solid between A and B atoms of A are arranged in ccp array and at...

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  6. The arrangement ofCI^(-) ions in CsCI structure is

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  7. Which of the following solids is the structure of CsCl crystal ?

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  8. Close packing is maximum in the crystal which is

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  9. The radius of Ag^(+) ion is 126 pm and that of I^(-)ion is 216 pm. The...

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  10. In hexagonal primitive unit cell, the Corner is shared by:

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  11. The greater the value of r(+)//r(-).

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  12. In flourite structure (CaF2)-

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  13. CsBr has bcc lattice with the edge length 9.4 Å, the shortest inter- i...

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  14. The mass of unit cell of CaF(2) (fluorite structure) corresponds to

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  15. Fe(3)O(4) is:

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  16. When anion leaves the normal lattice site and electron occupies inters...

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  17. The 8 : 8 type of packing is present in :

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  18. Select the incorrect statment:

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  19. Solid A^(+)B^(-) has a bcc structure .If the distance of closest appor...

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  20. The edge length of a cube is 400 pm .its body diagonal would be

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