Question:
Structure of the crystal of sodium chloride is:
Structure of the crystal of sodium chloride is:
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NaCl crystal is an example of a rock-salt structure with fcc arrangement, where each ion is octahedrally surrounded by opposite ions.
Updated On: Oct 7, 2025
- body centred cubic (bcc)
- face centred cubic (fcc)
- orthorhombic
- tetragonal
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The Correct Option is B
Solution and Explanation
Step 1: Understanding NaCl crystal structure.
The crystal structure of sodium chloride (NaCl) is based on the arrangement of Na\(^+\) and Cl\(^-\) ions. Each Na\(^+\) ion is surrounded by 6 Cl\(^-\) ions and each Cl\(^-\) ion is surrounded by 6 Na\(^+\) ions. This gives it a coordination number of 6:6.
Step 2: Identifying lattice type.
This arrangement corresponds to a face centred cubic (fcc) lattice, also known as the rock-salt structure.
Step 3: Conclusion.
Thus, the correct answer is (B) face centred cubic (fcc).
The crystal structure of sodium chloride (NaCl) is based on the arrangement of Na\(^+\) and Cl\(^-\) ions. Each Na\(^+\) ion is surrounded by 6 Cl\(^-\) ions and each Cl\(^-\) ion is surrounded by 6 Na\(^+\) ions. This gives it a coordination number of 6:6.
Step 2: Identifying lattice type.
This arrangement corresponds to a face centred cubic (fcc) lattice, also known as the rock-salt structure.
Step 3: Conclusion.
Thus, the correct answer is (B) face centred cubic (fcc).
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