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The tetrahedral voids formed by ccp arra...

The tetrahedral voids formed by ccp arrangement of `CI^(-)` ions in rock salt structure are

A

occupied by `Na^(+)` only

B

occupied by `Cl^(-)`

C

occupied by either `Na^(+)` or `Cl^(-)`

D

neither occupied by `Na^(+)` nor `Cl^(-)`

Text Solution

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The correct Answer is:
To solve the question regarding the tetrahedral voids formed by the close-packed arrangement of Cl⁻ ions in the rock salt structure, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Rock Salt Structure**: - The rock salt structure (NaCl) consists of a face-centered cubic (FCC) arrangement of Cl⁻ ions. In this structure, Cl⁻ ions occupy the corners and face centers of the cube. 2. **Identify the Position of Na⁺ Ions**: - In the rock salt structure, Na⁺ ions are located at the edge centers and the body center of the cube. Each Na⁺ ion is surrounded octahedrally by six Cl⁻ ions. 3. **Determine the Tetrahedral Voids**: - In a face-centered cubic arrangement, tetrahedral voids are formed in the structure. Each unit cell of FCC contains 8 tetrahedral voids. These voids are located at specific positions within the unit cell. 4. **Check Occupation of Tetrahedral Voids**: - In the case of NaCl, the tetrahedral voids are not occupied by either Na⁺ or Cl⁻ ions. This is because the Na⁺ ions fill the octahedral voids, while the tetrahedral voids remain empty. 5. **Conclusion**: - Therefore, the tetrahedral voids formed by the close-packed arrangement of Cl⁻ ions in the rock salt structure are unoccupied. ### Final Answer: The tetrahedral voids formed by the close-packed arrangement of Cl⁻ ions in the rock salt structure are **unoccupied**.
To solve the question regarding the tetrahedral voids formed by the close-packed arrangement of Cl⁻ ions in the rock salt structure, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Rock Salt Structure**: - The rock salt structure (NaCl) consists of a face-centered cubic (FCC) arrangement of Cl⁻ ions. In this structure, Cl⁻ ions occupy the corners and face centers of the cube. 2. **Identify the Position of Na⁺ Ions**: ...
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