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Which type of defect has the presence of...

Which type of defect has the presence of cations in the interstitial sites ?

A

Schottky defect

B

Vacancy defect

C

Frenkel defect

D

Metal deficiency defect

Text Solution

Verified by Experts

The correct Answer is:
C
In Frenkel defect some of ion (usually cation due to their small size) missing from their normal position and occupies position in interstitial position.
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Which type of 'defect' has the pressence of cations in the interstitial sites?

Assertion (A) : Non-stoichiometric compounds are called Bertholide compounds. NaCl and KCl crystal, when heated in an atmosphere of Na and K varpours, respectively, they impart violet and yellow colours to NaCl and KCl , respectively. Reason (R ) : Metal excess defect is due to the presence of extra cations atg the interstitial sites. The excess metal ions move to the interstitial sites and the electrons to the neighbouring sites. The colour results byt the excitation of these electrons by absorbing suitable energy from visible light. When the excited electroon comes back to the ground state, there is emission of radiation in the visible region and gives complimentary colour.

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In crystalline solids, few of the cations moved from their positions into the interstitial position . The defect is called as

DISHA PUBLICATION-THE SOLID STATE-EXERCISE -2 : CONCEPT APPLICATOR
  1. Which type of defect has the presence of cations in the interstitial s...

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  2. Non-stoichiometric compound have the properties of:

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  3. The ability of a substance to exist in two or more crstaline forms kno...

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  4. For a cubic geometry the limiting (r^+)/(r^-) is:

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  5. The intermetallic compounds LiAg crystallises in cubic lattice in whic...

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  6. A compound formed by elements A and B crystallizes in cubic structure,...

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  7. A compound formed by elements X and Y crystallises in a cubic structur...

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  8. Na and Mg crystallize in bcc- and fcc-type crystals, respectively, the...

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  9. A match box exhibits

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  10. Li' forms a body centered cubic lattice. If the lattice constant is 3....

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  11. Coordination number of "C" in Be2C3 whose structure is correlated wit...

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  12. The fraction of volume occupied by atoms in a primitive cubic unit cel...

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  13. The fraction of volume occupied by atoms in a body centered cubic unit...

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  14. The fraction of volume occupied by atoms in a face centered cubic unit...

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  15. Moldydenum ("At. mass=96g//mol"^(-1)) crystallizes as bcc crystal. If ...

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  16. The atomic fraction (d) of tin in bronze (fcc) with a density of 7717 ...

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  17. Which one of the following has minimum value of cation/anion ratio ?

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  18. What is the number of tetrahedral voids per atom in a crystal?

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  19. Which set of following characteristics for ZnS crystal is correct?

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  20. By X-ray diffraction it is found tht nickel ("at mass"=59g "mol"^(-1))...

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  21. CsBr crystallises in a body centered cubic lattice. The unit cell leng...

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