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Solid State Test - 4

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Solid State Test - 4
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Weekly Quiz Competition
  • Question 1
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    In which of the following types of solids is conductivity due to the presence of impurities and defects?
  • Question 2
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    Which among the following is an example of network solid?

    Solution

    Carbon is network solid due to its tendency to form covalent bonds between adjacent atoms throughout the crystal.

  • Question 3
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    Which of the following is an example of hydrogen bonded molecular solid?
  • Question 4
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    Amorphous solids are also known as

    Solution

    Because they have a tendency to flow, though very slowly. Also known as super cooled liquids.

  • Question 5
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    Cesium chloride unit cell is a simple cubic unit cell. The centre of the unit cell is occupied by an ion of opposite charge. If the density of CsCl is 3.988 g cm–3, which of the following statements is true? [Atomic mass of Cs = 132.9 u, atomic mass of Cl = 35.5 u]
  • Question 6
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    Which among the following is not an example of amorphous solids?

    Solution

    Quartz is not amorphous solids because unlike amorphous solids it has long range order. Quartz is a crystalline solid.

  • Question 7
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    Which of the following crystals is an example of cubic crystal system?
  • Question 8
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    Solids which are insulators in solid state and conductors in solution state or molten form are
  • Question 9
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    Which of the following is an example of metal deficiency defect in crystals?
  • Question 10
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    Directions: The following question has four choices out of which ONLY ONE is correct.

    Which of the following fcc structures contains cations in alternate tetrahedral voids?
  • Question 11
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    Match the following:

    Column – I Column – II
    (A) Schottky defect (a) Presence of ion in the normally vacant interstitial sites
    (B) Frenkel defect (b) Silicon doped with phosphorus
    (C) Interstitial defect (c) Ion leaves its correct lattice site and occupies an interstitial site
    (D) Extrinsic conduction (d) One positive ion and one negative ion displace from their positions, leaving behind a pair of holes
  • Question 12
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    A compound formed by elements A and B crystallises in cubic structure, in which A atoms are at the corners of the cube, while B atoms are at the face centres of the cube. What is the formula of the compound?
  • Question 13
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    Which of the following crystal systems has three unequal axes at right angles to each other?
  • Question 14
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    A solid is formed and it has three types of atoms X, Y and Z. X forms an fcc lattice with Y atoms, occupying all the tetrahedral voids and Z atoms occupy half the octahedral voids. The formula of the solid is
  • Question 15
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    In which of the following ionic solids is the coordination number of each of the ions 4?
  • Question 16
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    Potassium crystallises in a body-centered cubic lattice with unit cell length a = 5.20 .

    Which of the following statements is wrong?
  • Question 17
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    Which of the following defects does ZnS show?
  • Question 18
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    Which of the following substances is/are diamagnetic?
  • Question 19
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    Which among the following is not true for crystalline solid?

    Solution

    Crystalline solids have regular pattern of arrangement of particles (atoms, molecules or ions) which repeat itself periodically over the entire crystal which means they have long range orders.

  • Question 20
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    In which of the following cubic lattices are the points present at all the corners as well as at the centre of the cube?
  • Question 21
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    How many tetrahedral voids can exist per unit cell in hexagonal close packing sphere?

    Solution

    For hcp packing Z(no. of atoms per unit cell is 6) and no. of Td voids are 2Z (2 × 6=12).

  • Question 22
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    The zinc blende (ZnS) structure is cubic. The unit cell may be described as a face-centred sulphide ion sublattice with zinc ions in the centre of alternating minicubes made by partitioning the main cube into 8 equal parts.

    How many nearest neighbours does Zn2+ ion have?
  • Question 23
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    Directions: The following question has four choices out of which ONLY ONE is correct.

    The number of formula units of NaCl in the unit cell is
  • Question 24
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    The general formula of an ionic compound crystallising in body-centred cubic structure is 
  • Question 25
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    Which of the following best describes the reason for flame colours of metal ions? 
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