Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Solid State question

2008 · Shift 2 · Q19
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Advanced
  3. /Chemistry
  4. /Solid State
  5. /2008 · Shift 2 · Q19

Solid State question

2008 · Shift 2 · Q19

JEE AdvancedChemistrySolid StateMCQ+3 / −1
In hexagonal systems of crystals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are regular hexagons and three atoms are sandwiched in between them. A space-filling model of this structure, called hexagonal close-packed (HCP), is constituted of a sphere on a flat surface surrounded in the same plane by six identical spheres as closely as possible. Three spheres are then placed over the first layer so that they touch each other and represent the second layer. Each one of these three spheres touches three spheres of the bottom layer. Finally, the second layer is covered with a third layer that is identical to the bottom layer in relative position. Assume radius of every sphere to be 'r'.The volume of this HCP unit cell is :
  1. A
    242 r324\sqrt 2 \,{r^3}242​r3
  2. B
    162 r316\sqrt 2 \,{r^3}162​r3
  3. C
    122 r312\sqrt 2 \,{r^3}122​r3
  4. D
    6433 r3{{64} \over {3\sqrt 3 }}\,{r^3}33​64​r3
PreviousNext

More from Solid State

  • In hexagonal systems of crystals, a frequently encountered arrangement of atoms is described as a hexagonal prism. Here, the top and bottom of the cell are regular hexagons and three atoms are sandwiched in between them. A space-filling…2008 · MCQ
  • The density (in gcm−3) of the metal which forms a cubic close packed (ccp) lattice with an axial distance (edge length) equal to 400 pm is ​. Use: Atomic mass of metal =105.6amu…2025 · Numerical
  • In a metal deficient oxide sample, Mx​Y2​O4​(M and Y are metals), M is present in both +2 and +3 oxidation states and Y is in +3 oxidation state. If the…2024 · MCQ
  • Atoms of metals x,y, and z form face-centred cubic (fcc) unit cell of edge length Lx​, body-centred cubic (bcc) unit cell of edge length Ly​, and simple cubic unit cell of…2023 · Multiple correct
  • Atom X occupies the fcc lattice sites as well as alternate tetrahedral voids of the same lattice. The packing efficiency (in %) of the resultant solid is closest to2022 · MCQ
  • For the given close packed structure of a salt made of cation X and anion Y shown below (ions of only one face are shown for clarity), the packing fraction is approximately (packing fraction = 100packingefficiency​) Includes diagram2021 · MCQ
  • The cubic unit cell structure of a compound containing cation M and anion X is shown below. When compared to the anion, the cation has smaller ionic radius. Choose the correct statement(s). Includes diagram2020 · Multiple correct
  • Consider an ionic solid MX with NaCl structure. Construct a new structure (Z) whose unit cell is constructed from the unit cell of MX following the sequential instructions given below. Neglect the charge balance. (i)…2018 · Numerical