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How many unit cells are possible for the...

How many unit cells are possible for the crystallographic dimensions as `a ne b ne c alpha=gamma =90^(@),alphane beta`

A

2

B

1

C

4

D

3

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The correct Answer is:
A
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AAKASH SERIES-SOLID STATE-LEVEL - I (EXERCISE - I)
  1. In which of the following crystal systems F.C.C unit cells exists ?

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  2. Out of seven crystal systems how many have body centred unit cell ?

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  3. How many unit cells are possible for the crystallographic dimensions a...

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  4. Which of the following systems is not correctly characterised ?

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  5. The crystal system having one 6 fold axis is

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  6. The total number of crystal forms possible is around

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  7. Which of the following may have hexagonal or trigonal crystals :

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  8. {:("List I","List II"),("A) ccp","1) ABAB"),("B) hcp","2) BCC"),("C) C...

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  9. Which of the following has hcp crystal structure ?

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  10. Coordination number for Cu is

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  11. Which of the following is an example of body centred cube?

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  12. The co-ordination number of a metal crystallising in a hexagonal close...

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  13. An octahedral void is surrounded by how many spheres ?

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  14. How many Cl^(-) ions are there around Na^(+) ion in NaCl crystal

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  15. The void between two oppositly directed planar triangles of spheres in...

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  16. In a cubic close packed structure the number of nearest neighbours for...

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  17. Which of the following structure is most uncommon for metals ?

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  18. Which of the following packing is more efficient:

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  19. The packing efficiency in a simple cubic cell system of crystals is

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  20. The packing fraction for a body centred cube

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