Question

Which of the following option(s) are characteristics of a diamond?

• A. It is a conductor of electricity.
• B. It sublimes at 3500${}^{\text{o}}$ C.
• C. It has high thermal conductivity.
• D. It is very soft.

Answer 1

Answer: (B), (C)

The correct options are
B It sublimes at 3500${}^{\text{o}}$ C.
C It has high thermal conductivity.

Following are the characteristics of diamond:

• It is very hard because every carbon atom is strongly bonded with four other carbon atoms.
• It has high thermal conductivity due to the strong chemical bonding between the carbon atoms.
• It does not conduct electricity as each carbon atom is covalently bonded with four other carbon atoms and there are no free electrons.
• It changes from the solid state to gaseous state at 3500${}^{\text{o}}$ C without passing through the liquid state. This phenomenon is called sublimation.