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Solid State Test - 21

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Solid State Test - 21
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  • Question 1
    4 / -1
    On doping Ge metal with a little of In or Ga, one gets
  • Question 2
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    The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disappears. The behaviour is a characteristic of substance forming.
  • Question 3
    4 / -1
    The existence of a substance in more than one solid modification is known as
  • Question 4
    4 / -1
    A liquid can exist only:
  • Question 5
    4 / -1
    For a covalent solid, the units which occupy lattice points are :
  • Question 6
    4 / -1
    When electrons are trapped into the crystal in anion vacancy, the defect is known as :
  • Question 7
    4 / -1
    In the laboratory, sodium chloride is made by burning sodium in the atmosphere of chlorine. The salt obtained is yellow in colour. The cause of yellow colour is
  • Question 8
    4 / -1
    If one end of a piece of a metal is heated the other end becomes hot after some time. This is due to
  • Question 9
    4 / -1
    If we mix a pentavalent impurity in a crystal lattice of germanium, what type of semiconductor formation will occur ?
  • Question 10
    4 / -1
    A metallic crystal crystallises into a lattice containing a sequence of layers AB AB AB …..Any packing of spheres leaves out voids in the lattice. What percentage of volume of this lattice is empty space ?
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