1. Tardigrade
  2. Question
  3. Chemistry
  4. Ionic radii of cation A +and anion B -are 102 and 181 pm respectively. These ions are allowed to crystallize into an ionic solid. This crystal has cubic close packing for B - . A +is present in all octahedral voids. The edge length of the unit cell of the crystal A B is pm. (Nearest Integer)

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Ionic radii of cation $A ^{+}$and anion $B ^{-}$are 102 and $181 pm$ respectively. These ions are allowed to crystallize into an ionic solid. This crystal has cubic close packing for $B ^{-} . A ^{+}$is present in all octahedral voids. The edge length of the unit cell of the crystal $A B$ is ___$pm$. (Nearest Integer)

JEE MainJEE Main 2022The Solid State

Solution:

$ a=2\left(r_{+}+r_{-}\right) $
$ a=2(102+181) $
$ a=2(283) $
$a=566\, pm$