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Solid State Tes...

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  • Question 1
    4 / -1

    The radius of Na+ and Cl- ions are 95 pm and 181 pm respectively. The edge length of NaCl unit cell is

  • Question 2
    4 / -1

    Sodium metal crystallises at room temperature in a body centred cubic lattice with a cell edge a = 4.29 Å . The radius of sodium atom is

  • Question 3
    4 / -1

    A metallic element has a cubic lattice. Each edge of the unit cell is 2 Å. The density of the metal is 2.5 g cm-3. The unit cells in 200 g of metal are

  • Question 4
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  • Question 5
    4 / -1

    Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be:

  • Question 6
    4 / -1

    In orthorhombic, the value of a, b and c are respectively 4.2 Å , 8.6 Å and 8.3 Å. Given the molecular mass of the solute is 155 g mol-1 and that of density is 3.3 g/cc, the number of formula units per unit cell is

  • Question 7
    4 / -1

    Which one of the following defects in the crystals lowers its density ?

  • Question 8
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    If we mix a pentavalent impurity in a crystal lattice of germanium, what type of semiconductor formation will occur?

  • Question 9
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    Which of the following has the highest value of energy gap?

  • Question 10
    4 / -1

    Which kind of defect is shown by the given crystal?

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