Question

Distance b/w two carbon nuclei: options [1] 154 pm [2] 140 pm [3] 110 pm [4] 115 pm​

Answer 1

This is why graphite is used in pencil lead. The distance between layers is 0.335 nm. Carbon atoms in diamond are covalently bonded and are arranged in a three-dimensional tetrahedral structure. All bonds are of the same length, 0.154 nm.