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Schottky defect causes...

Schottky defect causes

A

Increase in the density of solid

B

Decrease in the density of solid

C

No change in the density of solid

D

Decrease in the conductivity of solid.

Text Solution

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The correct Answer is:
B
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If an element (at. wt. = 50) crystal in foc lattice, with a = 0.50 nm. What is the density of unit cel if it contains 0.25 % . Schottky defects (use N_(A) = 6 xx 10^(23) ) ?

Schottkey defects -

Schottky defect does not causes

(A) Schottky type defect is shown by crystals with high coordination number. (R) In crystals with Schottky defect cations always occupy interstitial positions

Which of the following statements are not correct ? (A) Diode is a combination of n-type and p-type semiconductors. (B) Silicon or germanium is electron rich impurity. (C ) Phosphorus and arsenic and electron deficient impurities. (D) Schottky defect decreases the density of the crystal.

What is Schottky defect ?

Schottky defect in crystals is observed when

(A) In any ionic solid with Schottky defects the number of positive and negative ions is same. (R) Equal number of cation and anion vacan­cies are present

Write short notes on : (a) Schottky defect (b) Frenkel defect

AAKASH SERIES-SOLID STATE-LEVEL - I (EXERCISE - II)
  1. A metal has bcc structure and the edge length of its unit cell is 3.04...

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  2. If the radius of K^(+) and F^(-) are 133 pm and 136 pm respectively, t...

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  3. Schottky defect causes

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  4. What type of crystal defect is indicated in the diagram below  |{:(Na...

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  5. Schottky - Wagner defects are mostly found in

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  6. Which among the following is likely to have Schottky defect.

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  7. (A) : During vacancy defect the density of solid decreases (R): The ...

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  8. Schottky defect in crystals is observed when

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  9. {:("List - I","List - II"),("A) Crystal defect","1) Amorphous"),("B) C...

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  10. Which of the following is a ''Berthollide Compound''?

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  11. To get n-type semiconductor, impurity to be added to silicon should ha...

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  12. The mechanism of electrical conductivity may be given in terms of

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  13. The oxide that is insulator is

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  14. In which of the following the conductivity would be in the order of 10...

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  15. Which one of the following ratio gives the purity of the metal (rho-re...

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  16. Germanium can be made n-type semi conductor by doping with

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  17. Which one of the following statements is wrong

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  18. The magnetic behavior is different from others in

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  19. The magnetic susceptibility of a substance can be expressed as

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  20. Which of the following is correct statement

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