The two features of carbon that lead to the formation of a large number of carbon compounds are as follows:
(i) Catenation − It is the ability to form bonds with other atoms of carbon.
(ii) Tetravalency − carbon has the valency of four so carbon is capable of bonding with four other atoms.
Final Answer: The two features of carbon that lead to the formation of a large number of carbon compounds are catenation and tetravalency.