हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

The total number of tetrahedral voids in the face-centered unit cell is ______.

Advertisements
Advertisements

प्रश्न

The total number of tetrahedral voids in the face-centered unit cell is ______.

विकल्प

  • 6

  • 8

  • 10

  • 12

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

The total number of tetrahedral voids in the face-centered unit cell is 8.

Explanation:

Fee unit cell contains 8 tetrahedral voids at centre of each 8 smaller cube of a unit cell as shown below

Eight tetrahedral voids per fee unit vell

Each cube represented by numeric 1, 2, 3, 4, 5, 6, 7, 8 contains one tetrahedral void.


Each cube contains one tetrahedral void its body centre as shown above

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 1: Solid States - Exercises [पृष्ठ ४]

APPEARS IN

एनसीईआरटी एक्झांप्लर Chemistry Exemplar [English] Class 12
अध्याय 1 Solid States
Exercises | Q I. 21. | पृष्ठ ४

संबंधित प्रश्न

Gold (atomic radius = 0.144 nm) crystallises in a face-centred unit cell. What is the length of a side of the cell?


Which is true for F-centers?


Which crystal system has axial angles equal to 90°?


Which crystal system has a ≠ b ≠ c?


The space lattice of graphite is ____________.


Coordination numbers of Zn2+ and S2– in the crystal structure of wurtzite are ____________.


In face-centered cubic lattice, a unit cell is shared equally by how many unit cells?


A unit cell of BaCl2 (fluorite structure) is made up of ____________.


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


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):


Assertion: Total number of octahedral voids present in unit cell of cubic close packing including the one that is present at the body centre, is four.

Reason: Besides the body centre there is one octahedral void present at the centre of each of the six faces of the unit cell and each of which is shared between two adjacent unit cells.


CsBr, crystallises in a body centred cubic lattice. The unit cell edge length is 436.6 pm. Given that the atomic mass of Cs = 133 a. m. u and that of Br = 80 a. m. u and Avogadro's number being 6.02 × 1023 mol–1, the density of Cs Br is:- .


Na and Mg crystallise in Bee and Fcc type crystals respectively. "The no. of atoms in the unit cells of their respective crystals is:


How many kind of space lattice are possible in a crystal.


The packing fraction for a body-centred cube is


The density of a crystal is given by the formula


Orthorhombic crystal has the following unit cell dimensions ______.


A certain element crystallises in a bcc lattice of unit cell edge length 27 A°. If the same element under the same conditions crystallises in the fcc lattice, the edge length of the unit cell in A° will be ______. (Round off to the Nearest Integer).

[Assume each lattice point has a single atom]


Gold crystallizes in a face-centered cubic lattice. If the length of the edge of the unit cell is 407 pm. The density of gold assuming it to be spherical is ______ g/cm3. Atomic mass of gold = 197 amu.


Which primitive unit cell has unequal edge lengths (a ≠ b ≠ c) and all axial angles different from 90°?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×