Why there is a plus 2 in oxidation number in carbon?

Answer 1

Carbon has +2 oxidation number in Carbon monoxide. It gets this oxidation number when it loses or shares two electrons.

Answer 2

The +2 oxidation state in carbon typically occurs when carbon forms four covalent bonds, as in compounds like carbon dioxide (CO2) or carbon monoxide (CO). In these compounds, carbon has achieved a full valence shell by accepting or sharing electrons, resulting in an oxidation state of +2.