Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
KCET2021ChemistrySolid State

In chrysoberyl, a compound containing beryllium, aluminium and oxygen, oxide ions form cubic close packed structure. Aluminium ions occupy 1 4 th of octahedral voids. The formula of the compound is

Options

  1. ABeAlO ₄
  2. BBeAl ₂ O ₄
  3. CBe ₂ AlO ₂
  4. DBeAlO ₂

Correct answer

B. BeAl ₂ O ₄

Step-by-step solution

Given, chrysoberyl forms ccp structure. Oxygen occupies lattice points =N (say) Al occupies 1 2 of octahedral voids = N 2 Be occupies 1 8 of tetrahedral voids = 2 N 8 The formula of compound is aligned & Be : Al : O & 2 N 8 : N 2 : N & BeAl ₂ O ₄ aligned

Practice Solid State on Quantrex Academy →

More from Solid State

Which of the following defects is observed in steel? 2026A metal has a fcc structure if the edge length of unit cell is 200 pm, calculate the volume occupied by particles in a unit cell. 2026A metal crystallizes in a bcc unit cell having unit cell volume 2.5 10⁻²³ cm ^3 . Find the number of unit cells in 18 g metal if the density of metal is 7.2 g cm ⁻³ . 2026Calculate the density of an element having molar mass 225 g mol ⁻¹ forming bcc structure [a^3 N_A = 75 cm ^3 mol ⁻¹] 2026What is the coordination number of particle in simple cubic structure ? 2026Calculate the radius of atom of metal forming fcc unit cell having edge length 360 pm 2026In ionic solid, anions are arranged in hcp array and cations occupy 1 2 tetrahedral voids. What is the formula of ionic compound ? [Consider A = Cation ; B = anion] 2026Which of the following statements is true about schottky defect ? 2026 Full Solid State list All KCET PYQs