The Carbon Cycle Characterizes the Cyclic Transformations of the Element

Multiple Choice

The carbon cycle characterizes the cyclic transformations of the element carbon through the environment and biomass. Some of the important species in this cycle are CO₂, CO₃^2-, C₆H₁₂O₆, and CH₄. Which of these compounds would undergo complete oxidation by O₂ to give the largest change in oxidation number?

A) CO₂
B) CO₃^2-
C) C₆H₁₂O₆
D) CH₄
E) CO₂ and CO₃^2- are equivalent in this regard.