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Solid State Test - 5

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Solid State Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Non-stoichiometric metal deficiency is observed in the salts of
  • Question 2
    1 / -0
    What is the number of unit cells present in a cube-shaped ideal crystal of NaCl of mass 1.0 g?
  • Question 3
    1 / -0

    Ionic solids containing large differences in sizes of ions show

    Solution

    Smaller atoms can easy occupy interstitial postion showing Frenekel Defect.

  • Question 4
    1 / -0
    The crystal system of a compound with unit cell dimensions a = 0.387 nm, b = 0.387 nm, c = 0.504 nm and  =  = 90o, = 120o is
  • Question 5
    1 / -0
    Which of the following statements is correct?
  • Question 6
    1 / -0

    Which is true for F - centers?

    Solution

    The paired electron can get excited and on returning back to ground state it emits light thus imparts color

  • Question 7
    1 / -0
    For a metallic crystal having bcc type staking pattern, what percentage of the volume of its lattice is empty?
  • Question 8
    1 / -0
    Which of the following compounds does not show metal deficiency defects?
  • Question 9
    1 / -0
    Which of the following statements is INCORRECT?
  • Question 10
    1 / -0
    Amorphous form of silica is
  • Question 11
    1 / -0
    Choose the correct statement(s) from the following:

    1. Frenkel and Schottky defects are thermodynamic defects.
    2. Compounds with Schottky defects do not obey law of constant composition.
    3. In compound with Frenkel defect, among a majority of metal ions of one valency, a few metal ions of another valency are also found.
  • Question 12
    1 / -0
    Which set of characteristics of ZnS crystal is correct?
  • Question 13
    1 / -0
    The cubic unit cell of Al (molar mass 27 g/mol) has an edge length of 405 pm. Its density is 2.7 g/cm3. The cubic unit cell is
  • Question 14
    1 / -0
    Calculate the packing efficiency of the two dimensional square unit cell which is shown below:

  • Question 15
    1 / -0
    The axial angles in triclinic crystal system are
  • Question 16
    1 / -0
    If Z is the number of atoms in the unit cell that represents the closest packing sequence ABC ABC ABC _______, the number of tetrahedral voids in the unit cell is:
  • Question 17
    1 / -0
    Find the respective coordination numbers of cations and anions in calcium fluoride structure.
  • Question 18
    1 / -0
    Which of the following statements are not true about hexagonal close packing?

    (a) It has 26% empty space.
    (b) In this arrangement, third layer is identical to the first layer.
    (c) The coordination number in this arrangement is 6.
    (d) It is as closely packed as body centred cubic packing.
  • Question 19
    1 / -0
    The close packing ABC ABC _____ is 
  • Question 20
    1 / -0
    Addition of CdCl2 to AgCl yields a solid solution where divalent cations Cd2+ occupy Ag+ sites. Which of the following statements is true?
  • Question 21
    1 / -0
    Group 14 elements are converted to p–type semiconductors by doping them with
  • Question 22
    1 / -0

    Brass is an example of

    Solution

    brass shows all the characteristics of Mettalic Crystal

  • Question 23
    1 / -0
    NH4Cl crystallises in a body centred cubic lattice, with a unit cell distance of 387 pm. If the radius of the Cl ions is 181 pm, then the distance between the oppositely charged ions in the lattice and the radius of the NH4+ ion are
  • Question 24
    1 / -0
    Calculate the number of unit cells present in 1 g of gold which has face centered cubic lattice.
  • Question 25
    1 / -0
    The particles, when placed in adjacent rows, show a horizontal as well as vertical alignment and form squares. This type of packing is known as
  • Question 26
    1 / -0
    The coordination number of barium ions, Ba2+, in barium fluoride (BaF2) is 8. What must be the coordination number of fluoride ions?
  • Question 27
    1 / -0

    Coordination number of hcp and ccp is

    Solution

    In hcp and ccp lattice, each atom is surrounded by 12 other atoms . Therefore, hcp and ccp lattice have ccordination no. 12.

  • Question 28
    1 / -0
    In a face centered cubic lattice, a unit cell is shared equally by how many unit cells?
  • Question 29
    1 / -0
    If NaCl is doped with 10-4 mol% of SrCl2, the concentration of cationic vacancies will be
  • Question 30
    1 / -0

    Defect shown by non - ionic solids is

    Solution

    Because ionic solids must maintain electrical neutrality, so Non ionic solids shows vacancy and interstitial defect.

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