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JEE Main202229 Jul 2022Morning ShiftChemistrySolid StateActual

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 AB is___ pm .

Correct answer

0

Step-by-step solution

In given ionic compound anions form CCP lattice, And cation is present in octahedral void. Means this structure is similar to structure of NaCl. Which is also called rock salt structure. Edge length = a = ? In rock salt structure cations and anions are in contact along the edge of the cube. So, a = 2 r + + r - a = 2 102 + 181 a = 2 283 a = 566   pm

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