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Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
(a) Diamond
(b) Graphite
(c) Sulphur
(d) Fullerene
Answers (1)
Ans. (b)
Graphite is a non-metal which conducts electricity.
Diamond and graphite are allotropes of Carbon (a non-metal).
A graphite crystal comprises of layers of carbon molecules or sheets of carbon particles. Each carbon atom in a graphite layer is joined to three other carbon atoms by strong covalent bonds to form flat hexagonal rings. The fourth valence electron of every carbon atom is free to move. Due to the presence of free electrons in a graphite crystal, it conducts electricity.
Therefore option (b) is correct
View full answer
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