The structure of NaCl crystal is A. Body centered cubic B. Face centered cubic C. Octahedral D. Square planar

Body centered cubic
Face centered cubic
Octahedral
Square planar

The correct answer is $\boxed{\text{C}}$.

NaCl is an ionic crystal, which means that it is made up of positively charged sodium ions and negatively charged chloride ions. The ions are arranged in a cubic structure, with each sodium ion surrounded by six chloride ions and each chloride ion surrounded by six sodium ions. This arrangement is called an octahedral crystal structure.

A body centered cubic (bcc) crystal structure is a cubic crystal structure in which each lattice point is occupied by an atom. The atoms are arranged in a cubic lattice with an atom at the center of each cube.

A face centered cubic (fcc) crystal structure is a cubic crystal structure in which each lattice point is occupied by an atom. The atoms are arranged in a cubic lattice with an atom at the center of each face of the cube.

A square planar crystal structure is a crystal structure in which the atoms are arranged in a square planar lattice. The atoms are bonded to each other in a way that forms a square with four atoms at the corners and one atom in the center.

In conclusion, the structure of NaCl crystal is octahedral.

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