Which of the following statements is not correct ?

Options

A. The number of carbon atoms in the unit cell of diamond is 4
B. The number of Bravais lattics in which a crystal can be catagorized is 14
C. The fraction of the total volume occupied by the atoms in a primitive cell is `0.48`
D. Molecular solids are generally volatile

Answer

C

Explanation

In a primitive cell or simple cubic unit cell, the fraction of occupied space or packing efficiency is `0.52` and not `0.48`