Select the options which describe the characteristics of diamonds.
It is not a conductor of electricity.
It has high thermal conductivity.
The characteristics of diamonds are mentioned in option a and option d. Other characteristics of diamonds are:
(1) Diamonds are very hard because every carbon atom is covalently bonded with four other carbon atoms, so the arrangement of atoms and the covalent bonds between them are the reason for its hardness.
(2) It is transparent.
(3) It has a high refractive index.
(4) It has high thermal conductivity due to the strong chemical bonding between the carbon atoms.
(5) It is not a conductor of electricity as all the four electrons in its valence shell are bonded with four other carbon atoms and there are no free electrons in the structure like we see in graphite.