Question

At STP, solid carbon can exist as graphite or as diamond. These two forms of carbon have(1) the same properties and the same crystal structures(2) the same properties and different crystal structures(3) different properties and the same crystal structures(4) different properties and different crystal structures

Answer 1

The correct statement is in statement 4. The two solid carbons has different properties and different crystal structures. The way the carbons are arranged differs for the two which cause the distinct properties of the two. In a diamond, atoms are arranged tetrahedrally while, in graphite, the atoms are arranged in an infinite array but are layered.