For the following reaction, identify the element that was oxidized, the element that was reduced, and the reducing agent. Give an explanation for each answer.

2CO + 2NO - > 2CO2 + N2

The element that was oxidized is carbon, as it's oxidation state increased (electrons were lost) from + 2 (in the reactants) to + 4 (in the products). The element that was reduced is nitrogen, as it gained electrons and went from a + 2 oxidation state (reactants) to a 0 oxidation state (products). Since the carbon was oxidized and it's electrons were used to reduce the nitrogen, carbon is the reducing agent.