Which of the following is not correct about graphite?

Options

A. Graphite cleaves easily between the layers.
B. The density if graphite is higher than that if diamond.
C. Graphite is an excellent lubricant.
D. In graphite, the conduction of electricity can occur in a sheet, but not from one sheet to another.

Answer

B

Explanation

The wide spacing of sheets in graphite implies that the atoms do not pack together to fill space very effectively. Thus, the density of graphite `(2.22 g cm^(-3))` is lower than that of diamond `(3.51 g cm^(-3))`.
`(1)` Bonding between the different layers is weak. Thus, graphite cleaves easily between the layers which accounts for the remarkable softness of the crystals.
`(3)` By virtue of the ability of sheets of `C` atoms to slide over one another, graphite is use as a lubricant, either on its own or in graphite oil.
`(4)` The conductivity in the plane of the sheets is about `5000` times greater than that at right angles to the sheets.