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NaCl shows Schottku defects and AgCl Fre...

NaCl shows Schottku defects and AgCl Frenkel defects. The electrical conductivity is due to the:

A

motion of ions and not the motion of electrons

B

motion of electrons and not the motion of ions

C

lower co-ordination number of NaCl

D

higher co-ordination number of AgCl

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The correct Answer is:
A
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NaCl shows Schottky defects and AgCl shows Frekel defects. Their electrical conductivity is due to the

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Give reasons : (i) In stoichiometric dfects. NaCl exhibits Schottky defect and not Frenkel defect. (iii) Ferrimagnetic substances show better magnetism than antiferromagnetic substances.

(a) Calculate the number of unit cells in 8.1g of aluminium if it crystallizes in a f.c.c., structure. (Atomic mass of AI = 27 g mol^(-1) ) (b) Given reasons: (i) In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect. (ii) Silicon on droping with Phosphorus forms n-type semiconductor. (iii) Ferrimagnetic substances show better magnetism than antiferromagnetic substances.

RESONANCE ENGLISH-SOLID STATE-Exercise -2 (Part-I)
  1. Which of the following are not correctly matched with the bonds found ...

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  2. Which of the following is not correct for ionic solids ?

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  3. An element with atomic mass 100 has a bcc structure and edge length 40...

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  4. What is the nearest distance between two different layers in ABAB arra...

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  5. In a face centered lattice of X and Y, X atoms are present at the corn...

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  6. You are given 6 identical balls . The maximum number of square voids a...

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  7. In a simple cubic lattice of anions, the side length of the unit cell ...

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  8. In a multi layered close-packed structure

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  9. In a compound,oxide ions are arranged in cubic close packing arrangeme...

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  10. Platinum crystallize in a face-centred cubic crystal with a unite cell...

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  11. Platinum crystallises in a face centered cube crystal with a unit cell...

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  12. Gold has a face centered cubic lattice with an edge length of the unit...

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  13. Which of the following statements is correct in the rock-salt structur...

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  14. The compound AB crystallizes in a cubic lattice in which both A and B ...

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  15. BaO has a rock-salt type structure. When subjected to high pressure, t...

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  16. A crystal of NaCl, which has sodium ions and chloride ions missing fro...

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  17. In a Schottky defect

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  18. NaCl shows Schottku defects and AgCl Frenkel defects. The electrical c...

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  19. Zinc oxide, white in colour at room temperature, acquires yellow colou...

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