Which one of the following is non-crystalline or amorphous?
Which of the following statements about amorphous solids is incorrect ?
The coordination number of atoms in a cubic closed-packed is ________.
NaCl typecrystal (with coordination no. 6 : 6) can be converted into CsCl type crystal (with coordination no. 8 : 8) by applying
A unit cell of BaCl2 (fluorite structure) is made up of
Which of the following is not a characteristic property of solids?
The coordination number of Y will be in the XY types of crystal:
Which of the following is not a crystalline solid?
The fraction of the total volume occupied by the atoms present in a simple cube is
Edge length of unit cell of chromium metal is 287 pm with bcc arrangement. The atomic radius is of the order
How many lithium atoms are present in a unit cell with edge length 3.5 Å and density 0.53 g cm-3? (Atomic mass of Li = 6.94):
The distance between Na– and CL– ions in NaCl with a density 2.165 g cm-3 is
The edge length of fee cell is 508 pm. If radius of cation is 110 pm, the radius of anion is
Fe3O4 (magnetite) is an example of
Which of the following crystals does not exhibit Frenkel defect?
What type of stoichiometric defect is shown by ZnS?
Silver halides generally show
Which of the following will have metal deficiency defect?
p-type semiconductors are formed When Si or Ge are doped with
In which pair most efficient packing is present?