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Which of the following packing is more e...

Which of the following packing is more efficient:

A

square close - packing

B

hexagonal close - packing

C

tetrahedral arrangement

D

none of these

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The correct Answer is:
B
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AAKASH SERIES-SOLID STATE-LEVEL - I (EXERCISE - I)
  1. In a cubic close packed structure the number of nearest neighbours for...

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

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  3. Which of the following packing is more efficient:

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

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  5. The packing fraction for a body centred cube

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  6. Density of a crystal is given by :

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  7. The percent of void space in a body - centred cubic lattice is :

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

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  9. The limiting radius ratio for tetrahedral shape is

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  10. AB is an ionic solid. If the ratio of ionic radii of A^(+) and B^(+) i...

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  11. For an octahedral arrangement the lowest radius ratio limit is

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  12. (A): Thermodynamically all solids possess a tendency to acquire defect...

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  13. At zero kelvin, most of the ionic crystals possess

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  14. In stoichiometric defects, the ratio of positive and negative ions as ...

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  15. In a solid lattice the cation has left a lattice site and is located a...

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  16. Non stoichiometric solid among the following

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  17. Which of the following has both Schottky and Frenkel defects.

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  18. (A) Schottky and Frenkel defects are also called thermodynamic defects...

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  19. On doping Ge metal with a little of gallium one gets

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  20. A solid with high electrical and thermal conductivity from the followi...

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