Graphite is a good conductor of electricity due to the presence of ......... .
(1) Lone pair of electrons.
(2) Free valence electrons.
(3) Cations.
(4) Anions.
(2) HINT: Graphite is a covalent solid.
Explanation: Graphite is a good conductor of electricity due to presence of free valence electrons. In graphite, each carbon is sp2 hybridised having one free electron which makes graphite a good conductor of electricity.