Carbon can exist in a number of different oxidation states W

Carbon can exist in a number of different oxidation states. Which of the C containing compounds, shown below, can not serve as a reducing agent CO CH4 CH3CI CO3 CaC2 2

Solution

Reducing agent will oxidize itself.

So CO3^2- can not oxidize further. C = +4 in CO3^2- , which is highest oxidation state of C atom.

So answer = CO3^2-