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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

Metal deficiency defect

B

Schottky defect

C

Vacancy defect

D

Frenkel defect

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The correct Answer is:
D
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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

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

RC MUKHERJEE-SOLID AND LIQUID STATES -OBJECTIVE PROBLEMS
  1. In the NaCl crystal, which of the following facts is not true?

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  2. The decreasing order of the size of void is .

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

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  4. An organic liquid rises 2.0 cm in a capillary tube. How much will it r...

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  5. When the temperature is increased, surface tension of water:

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  6. The units of surface tension in cgs and SI units are respectively,

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  7. The units of viscosity in cgs and SI units are respectively,

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  8. The rise of a liquid in a capillary tube is due to :

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  9. The coefficient of viscosity of a solution and its solvent are respect...

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  10. Which of the following properties of liquids increases with the increa...

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  11. The surface tension of several alcohols at 20°C is gamma(CH(3)OH)= 22....

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  12. The packing fraction of the two dimensional square unit cell shown bel...

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  13. Which of the following exists as covalent crystals in the solid state?

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  14. CsClcrystallizes in body centred cubic lattice. If 'a' is its edge len...

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  15. Sodium metal crystallises in a body centred cubic lattice with a unit ...

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  16. If the unit cell of a mineral has cubic close packed (ccp) array of ox...

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

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  18. The correct statement (s) for cubic close packed (ccp) three dimension...

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

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  20. All of the following share the same crystal structure except

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