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Q: Which of these is a very good conductor of electricity-
  • A. Mica
  • B. Bakelite
  • C. Graphite
  • D. Dry air
Correct Answer: Option C - Graphite is a good conductor of electricity. Graphite is a non-metallic. Its exceptional properties are due to its unique structure. The fourth valence electron of each atom is present between different layers. This free electron makes graphite the best conductor of electricity.
C. Graphite is a good conductor of electricity. Graphite is a non-metallic. Its exceptional properties are due to its unique structure. The fourth valence electron of each atom is present between different layers. This free electron makes graphite the best conductor of electricity.

Explanations:

Graphite is a good conductor of electricity. Graphite is a non-metallic. Its exceptional properties are due to its unique structure. The fourth valence electron of each atom is present between different layers. This free electron makes graphite the best conductor of electricity.