Solid State One Mark Question

12th Standard EM

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 15
    10 x 1 = 10
  1. Graphite and diamond are

    (a)

    Covalent and molecular crystals

    (b)

    ionic and covalent crystals

    (c)

    both covalent crystals

    (d)

    both molecular crystals

  2. In calcium fluoride, having the flurite structure the coordination number of Ca2+ ion and F- Ion are (NEET)

    (a)

    4 and 2

    (b)

    6 and 6

    (c)

    8 and 4

    (d)

    4 and 8

  3. The number of carbon atoms per unit cell of diamond is

    (a)

    8

    (b)

    6

    (c)

    1

    (d)

    4

  4. The ionic radii of A+ and B are 098X10-10 mand 1.81X10-10. m. the coordination number of each ion in AB is

    (a)

    8

    (b)

    2

    (c)

    6

    (d)

    4

  5. Which of the following cannot be regarded as molecular solid?

    (a)

    Silicon carbide

    (b)

    AIN

    (c)

    Diamond

    (d)

    All the above

  6. Which of the following is characteristic of ionic solids?

    (a)

    Very low value of electrical conductivity in the molten state

    (b)

    Brittie nature

    (c)

    Very strong forces of attractions

    (d)

    Anisotropic nature

  7. An example of metal deficiency defect

    (a)

    NaCl

    (b)

    AgCl

    (c)

    CsCl

    (d)

    FeS

  8. What is the relation between diamond and .graphite?

    (a)

    Polymorphous

    (b)

    Isomer

    (c)

    Isotope

    (d)

    Isomorphous

  9. A solid with formula ABC3 would probably have,

    (a)

    A at body centre, B at face centres and C at corners of the cube

    (b)

    A at corners of cube, B at body centre, C at face centre

    (c)

    A at corners of hexagon, B at centres of the hexagon and C inside the hexagonal unit cell

    (d)

    A at corner, B at face centre, C at body centre

  10. Amorphous solids have

    (a)

    Orderly arrangement of atoms

    (b)

    Long range of melting point

    (c)

    Anisotropy

    (d)

    both (a) and (c)

  11. 5 x 1 = 5
  12. Metal deficiency defect

  13. (1)

    KCI

  14. Metal excess defect

  15. (2)

    NaCI

  16. Metal deficiency defect

  17. (3)

    FeO

  18. Schottky defect

  19. (4)

    FeO with Fe3+

  20. Frenkel defect

  21. (5)

    AgBr

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