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    The Solid State

    Multiple Choice QuestionsShort Answer Type

    51. An element occurs in the bcc structure. How many atoms are present in its unit cell explain ?
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    52. What is the number of atoms per unit cell in a body centred cubic structure?
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    53. What are lattice defects imperfection?
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    54. what is Frenkel defect.Why is Frenkel defect found in AgCl ?
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    55. What  type of void are developed in hexagonal close packing?
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    56. What is the co-ordination number of an octahedral void?
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    57. Give two exampls of the compounds that exhibit Schottky defect.
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    58. What are interstitials in a crystal?
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    59. What will happen if NaCl crystal is subjected to high pressure?
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    60. What is unit cell.

    Unit cell: It is the smallest repeated unit in a crystal lattice e.g., in sodium chloride and caesium chloride, the unit cell is a cube. It has all the characteristic properties of crystal.
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