Solid State One Mark Questions

12th Standard EM

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 10
    5 x 1 = 5
  1. Graphite and diamond are

    (a)

    Covalent and molecular crystals

    (b)

    ionic and covalent crystals

    (c)

    both covalent crystals

    (d)

    both molecular crystals

  2. An ionic compound AxBy crystallizes in fcc type crystal structure with B ions at the centre of each face and A ion occupying entre of the cube. the correct formula of AxBy is

    (a)

    AB

    (b)

    AB3

    (c)

    A3B

    (d)

    A8B6

  3. The number of unit cells in 8 gm of an element X ( atomic mass 40) which crystallizes in bcc pattern is (NA is the Avogadro number)

    (a)

    6.023 X 1023

    (b)

    6.023 X 1022

    (c)

    60.23 X 1023

    (d)

    \(\left( \cfrac { 6.023\times { 10 }^{ 23 } }{ 8\times 40 } \right) \)

  4. 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

  5. An example of metal deficiency defect

    (a)

    NaCl

    (b)

    AgCl

    (c)

    CsCl

    (d)

    FeS

  6. 5 x 1 = 5
  7. Metal deficiency defect

  8. (1)

    FeO with Fe3+

  9. Metal excess defect

  10. (2)

    KCI

  11. Metal deficiency defect

  12. (3)

    FeO

  13. Schottky defect

  14. (4)

    NaCI

  15. Frenkel defect

  16. (5)

    AgBr

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