CBSE  /  Class 12  /  Chemistry  /  The Solid State

  • 1. 
    Which one of the following is non-crystalline or amorphous?

  • Diamond
  • Graphite
  • Glass
  • Common Salt

  • 2. 
    NaCl typecrystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordination no. 8 : 8) by applying

  • high temperature
  • high pressure
  • high temperature and high pressure
  • low temperature and low pressure

  • 3. 
    How many chloride ions are surrounding sodium ion in sodium chloride crystal ?

  • 4
  • 8
  • 6
  • 12

  • 4. 
    In NaCl structure

  • all octahedral and tetrahedral sites are occupied
  • only octahedral sites are occupied
  • only tetrahedral sites are occupied
  • neither octahedral nor tetrahedral sites are occupied

  • 5. 
    In Zinc blende structure

  • zinc ions occupy half of the tetrahedral sites
  • each Zn
  • each S
  • it has fee structure

  • 6. 
    A unit cell of BaCl

  • four Ba
  • four Ba
  • eight Ba² ions and four Cl
  • four Ba² ions and six Cl

  • 7. 
    Alkali halids do not show Frenkel defect because

  • cations and anions have almost equal size
  • there is a large difference in size of cations and anions
  • cations and anions have low coordination number
  • anions cannot be accommodated in voids

  • 8. 
    The coordination number of Y will be in the XY types of crystal:

  • 6
  • 8
  • 12
  • 4

  • 9. 
    The fraction of the total volume occupied by the atoms present in a simple cube is

  • \(\frac{π}{4}\)
  • \(\frac{π}{6}\)
  • \(\frac{π}{3√2}\)
  • \(\frac{π}{4√2}\)

  • 10. 
    Edge length of unit cell of chromium metal is 287 pm with bcc arrangement. The atomic radius is of the order

  • 287 pm
  • 574 pm
  • 124.27 pm
  • 143.5 pm
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