Question

Which of the following statements regarding graphite is not correct?

• A. Graphite is a good conductor of electricity.
• B. Graphite is less dense than diamond.
• C. The bond length of sigma bonded C-C bond in 154 pm.
• D. Graphite is thermodynamically more stable than diamond.

Answer 1

The correct option is C The bond length of sigma bonded C-C bond in 154 pm.

The bonding is due to the $s{p}^3$ hybrid orbitals.

The bond length of $154$ pm is the same as the $(C-C)$ bond length in ethane, propane and other alkanes.

And idealized single crystal of diamond is a gigantic molecule, because all the atoms are inter-bonded.

This is true for diamond not for graphite