Question

The number of octahedral sites per sphere in fcc structure is,
a) 1
b) 2
c) 3
d) 4

Answer 1

The answer will be one only.

The rule that will follow it up is that the octahedral sites will have the sphere of the sites that will be void in the body.

Hence, the total number of octahedral sites will be equal to the number of packing sphere.

Hence, the answer will be 1.