Question

Which one of the following is not true for the form of carbon known as diamond?

(a) It is harder than graphite.

(b) It contains the same percentage of carbon as graphite.

(c) It is a better electric conductor than graphite.

(d) It has different carbon to carbon distance in all directions.

Answer 1

(c) It is a better electric conductor than graphite.

In graphite, each carbon atom is bonded to three other carbon atoms in the same plane given a hexagonal array. The fourth electron of each carbon atom is free.