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Which of the following defects, if prese...

Which of the following defects, if present, lowers the density of the crystal ?

A

F centre

B

Frenkel

C

Schottky

D

Interstitial

Text Solution

Verified by Experts

The correct Answer is:
C
During the Schottky defects same number of cations and anions are missing from their lattice site so density is decreased.
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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 ?

Which of the following defects is present in KCl crystals ?

Which point defect lowers the density of a crystal?

Which of the following defects decrease the density ?

ERRORLESS-SOLID STATE-NCERT BASED QUESTIONS (DEFECTS IN CRYSTAL)
  1. In a solid lattice the cation has left a lattice sirte and is located ...

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  2. When electrons are trapped into the crystalline anion vacancy the def...

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  3. Which of the following defects, if present, lowers the density of the ...

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

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  5. which of the following is true about the change the charge acq...

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  6. Which of the following defects is also known as a dislocation defect?

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  7. Some polar crystals when heated produce small electrical current. The ...

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  8. With Which one of the following elements silicon should be doped so as...

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  9. Schottky defect occurs mainly in electrovalent compounds where

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  10. Zine oxide is white but it turns yellow on heating . Explain.

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  11. Frenkel defect generally appears in

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  12. The following is not a function of an impurity present in a crystal:

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  13. Point defects are present in .

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  14. If a non-metal is added to the interstitial sites of a metal, then the...

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  15. In AgBr crystal , the ion size lies in the order Ag^(+) lt lt Br^(-) T...

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  16. Which one of the following is the most correct statement?

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  17. The flame colours of metal ions are due to

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  18. Which one of the following crystal does not exhibit Frenkel defect?

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  19. Which of the following defect is seen in FeO

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  20. To get a n- type semiconductor from silicon , it should be doped...

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