Question

In which of the following structures coordination number for cations and anions in the packed structure will be same?
(a) Cl⁻ ions form fcc lattice and Na⁺ ions occupy all octahedral voids of the unit cell
(b) Ca²⁺ ions form fcc lattice and F⁻ ions occupy all the eight tetrahedral voids of the unit cell
(c) O²⁻ ions form fcc lattice and Na⁺ ions occupy all the eight tetrahedral voids of the unit cell
(d) S²⁻ ions form fcc lattice and Zn²⁺ ions go into alternate tetrahedral voids of the unit cell

Answer 1

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$\mathbb{NICE...QUESTION}$

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In which of the following structures coordination number for cations and anions in the packed structure will be same?
(a) Cl⁻ ions form fcc lattice and Na⁺ ions occupy all octahedral voids of the unit cell
(b) Ca²⁺ ions form fcc lattice and F⁻ ions occupy all the eight tetrahedral voids of the unit cell
(c) O²⁻ ions form fcc lattice and Na⁺ ions occupy all the eight tetrahedral voids of the unit cell
(d) S²⁻ ions form fcc lattice and Zn²⁺ ions go into alternate tetrahedral voids of the unit cell

→ [B]


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Answer 2

Answer :

In which of the following structures coordination number for cations and anions in the packed structure will be same?

(a) Cl⁻ ions form fcc lattice and Na⁺ ions occupy all octahedral voids of the unit cell

(b) Ca²⁺ ions form fcc lattice and F⁻ ions occupy all the eight tetrahedral voids of the unit cell

(c) O²⁻ ions form fcc lattice and Na⁺ ions occupy all the eight tetrahedral voids of the unit cell

(d) S²⁻ ions form fcc lattice and Zn²⁺ ions go into alternate tetrahedral voids of the unit cell

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The correct option is (b):  Ca²⁺ ions form fcc lattice and F⁻ ions occupy all the eight tetrahedral voids of the unit cell  

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hope it helps :)

thanks :))