Which one of the following statements is not correct?

Which one of the following statements is not correct?

Most carbon compounds are good conductors of electricity.
Bonding in organic compounds is covalent.
Graphite is used as a lubricant.
Diamond is an allotrope of carbon.
This question was previously asked in
UPSC NDA-1 – 2022
The correct answer is A) Most carbon compounds are good conductors of electricity. This statement is incorrect; most organic (carbon) compounds are covalent and do not conduct electricity well in their solid or liquid state.
– Conductivity of electricity requires the presence of free-moving charged particles (electrons or ions).
– Most carbon compounds (organic compounds) are formed by covalent bonds between nonmetal atoms (C, H, O, N, S, halogens, etc.). Covalent compounds typically do not form free ions or mobile electrons, so they are poor conductors or insulators.
– Statement B is correct: The primary bonding in organic compounds is covalent.
– Statement C is correct: Graphite, an allotrope of carbon, has a layered structure with delocalized electrons within the layers, which makes it a conductor and a good solid lubricant. However, graphite is an *exception* among carbon compounds regarding conductivity.
– Statement D is correct: Diamond is another well-known crystalline allotrope of carbon.
– The statement claims *most* carbon compounds are good conductors, which is false. The vast majority of organic molecules (e.g., sugars, plastics, oils, alcohols, proteins) are electrical insulators.
Exceptions to the non-conductivity of carbon compounds include graphite, some conjugated polymers, and ionic carbides (though ionic carbides are not typically considered “organic” compounds in the traditional sense). However, the general rule for the vast class of organic compounds is that they are poor conductors of electricity.