Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Most Important Selected Qs for JEE AdvancedChemistrySolid State

For the ionic compound A ₃ ~B , which of the following statements are correct, if radii of A ⁻ and B ³⁺ ion are respectively 5 x and 2 x and the lattice points have hcp arrangement?

Options

  1. A5 6 th of tetrahedral voids are vacant
  2. B1 3 rd of total voids are vacant in compound
  3. CThe coordination number of B ³⁺ is 4
  4. DThe coordination number of A ⁻ is 8

Correct answer

C. The coordination number of B ³⁺ is 4

Step-by-step solution

Radius ratio ( r ⁺ r ⁻ )= 2 x 5 x =0.4 , coordination number of B ³⁺ 4 Formula of the compound is A₃ B , i.e., 1 6 th of tetrahedral sites are occupied by B ³⁺ and so vacant tetrahedral sites are 5 6 th.

Practice Solid State on Quantrex Academy →

More from Solid State

The density (in g cm ⁻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 =105.6 amu 2025Atoms of metals x , y and z form face-centred cubic (fcc) unit cell of edge length L x , body-centred cubic (bcc) unit cell of edge length L y , and simple cubic unit cell of edge 2023Which of the following expressions is correct in case of a CsCl unit cell (edge length ‘ a ’) ? 2023Sodium metal crystallises in a body centred cubic lattice with unit cell edge length of 4 Å . The radius of sodium atom is _ _ _ × 10 - 1 Å . (Nearest integer) 2023An atomic substance A of molar mass 12 g mol – 1 has a cubic crystal structure with edge length of 300 pm . The no. of atoms present in one unit cell of A is (Nearest integer 2023The correct relationships between unit cell edge length ‘ a ’ and radius of sphere ‘ r ’ for face-centred and body-centred cubic structures respectively are 2023Number of crystal systems from the following where body centred unit cell can be found, is _____. Cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, triclinic 2023A compound is formed by two elements X and Y . The element Y forms cubic close packed arrangement and those of element X occupy one third of the tetrahedral voids. What is the form 2023 Full Solid State list All Most Important Selected Qs for JEE Advanced PYQs