The number of tetrahedral voids per unit cell in NaCl crystal is……
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a
4
b
8
c
equal the number of octahedral voids
d
four times the number of octahedral voids
answer is B.
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Detailed Solution
NaCl has a rock salt type structure having fcc arrangement.Total number of atoms per unit cell = 4∴Number of tetrahedral voids = 2 x 4 = 8Number of octahedral voids = 4