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Observe the following statements (i) Sil...

Observe the following statements (i) Silicon doped with P is a p-type semicon­ductor (ii) Presence of Schottky defects decreases the density (iii) Among simple cubic (sc), body centered cubic (bcc) and cubic close packing (ccp) stru ctu res, the p ack in g e fficie n cy is highest for ccp The correct statements are

A

I,ii and iii

B

I and iii

C

I and ii

D

ii and iii

Text Solution

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The correct Answer is:
D
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Match the following closest packing of identical spheres listed in Column-I with the characteristics listed in Column-II. COLUMN - I {:("COLUMN - I","COLUMN - II"),("A) AAAA packing","p) CCP, CN = 12"),("B) ABAB packing","q) HCP, CN = 12"),("C) ABCABC packing","r) BCC, CN = 8"),("D) Square close packing","s) Primitive cubic, CN = 6"):}

AAKASH SERIES-SOLID STATE-OBJECTIVE EXERCISE -2
  1. If one mole of AgCl is dopped with 10^(-5) mole of AICI3, the number ...

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  2. NaCZ is doped with 2 xx 10^(-2) mole% of SrCl(2) then the number of ca...

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  3. A solid solution of CdBr(2) in AgBr contains

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  4. Schottky defect in crystals is observed when

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

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

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  7. In NaCl number of Schottky pairs and number of ions per 1 cc is about ...

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

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  9. The magnetic behavior is different from others in

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  10. Which of the following is correct statement

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  11. The general formula of ferrites is MFe(2)O(4). Where 'M' would not be

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  12. Which of the following are diamagnetic in vapour state( A) Sodium meta...

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  13. At w hich tem perature, Fe(3)O(4) is a fe rri­magnetic solid converted...

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  15. The alignment of magnetic dipoles shown below uarr darr darr uarr darr...

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  16. Correct statements regarding F-centres are (a) they impart magnetic pr...

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  17. The material used in solar cells contains

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

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  19. The oxide that does not act as an insulator even by a change in temper...

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  20. Observe the following statements (i) Silicon doped with P is a p-type ...

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