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Which type of 'defect' has the pressence...

Which type of 'defect' has the pressence of cations in the interstitial sites?

A

Frenkel defect

B

Metal deficiency defect

C

Schottky defect

D

Vacancy defect

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The correct Answer is:
A
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Which type of defect has the presence 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.

Cations are present in the interstitial sites in …………… .

What are voids or interstitial sites ?

Impurity Defect Questions|Non-Stoichiometric Defect|Questions|Metal Excess Defect Due To The Presence Of Extra Cations At Interstitial Sites|Summary

RESONANCE-SOLID STATE-Exercise -3 (Part-II)
  1. Na and Mg crystallize in bcc- and fcc-type crystals, respectively, the...

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  2. How many unit cells are present in a cube-shaped crystal of NaCl of ma...

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  3. What type of crystal defect is indicated in the diagram given below : ...

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  4. An ionic compound has a unit cell consisting of A ions at the corners ...

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  5. The volume of atom present in a face-centred cubic unit cell of a meta...

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  6. In a compound ,atoms of element Y from ccp lattice and those of elemen...

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  7. Copper crystallises in fcc with a unit cell length of 361 pm. What is ...

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  8. The edge length of a face centred cubic cell of an ionic substance is ...

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  9. Percentages of free space in cubic close packed structure and in body ...

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  10. In a face centred cubic lattice, atom A occupies the corner positions ...

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  11. Copper crystallises in fcc lattice with a unit cell edge of 361 pm. Th...

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  12. Lithium forms body centred cubic structure. The length of the side of ...

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  13. Experimentally it was found that a metal oxide in formula M(0.98)O. Me...

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  14. CsCl crystallises in body centred cubic lattice. If 'a' its edge lengt...

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  15. Sodium metal crystallizes in body centred cubic lattice with the cell ...

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  16. Which of the following compounds is metallic and ferromagentic ?

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  17. A metal crystallises in a face centred cubic structure. If the edge le...

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  18. Which type of 'defect' has the pressence of cations in the interstitia...

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