Can carbon only form ionic compounds.?

No, carbon cannot only form ionic compounds; it primarily forms covalent compounds. This is due to its ability to share electrons with other elements, particularly nonmetals, to achieve stability. Carbon's tetravalent nature allows it to form a wide variety of organic molecules, including hydrocarbons and complex biomolecules, through covalent bonding. Ionic compounds are more commonly formed by metals with significantly different electronegativities.