Chemistry - CHEMICAL BONDING Question with Solution | TestHub

More is the single bond character more will be the bond length.
Thus, correct order is $\mathrm{CO}<{\mathrm{CO}}_2<{\mathrm{CO}}_3^{--}$ Related Theory Compounds with formal $\mathrm{C}\equiv \mathrm{O}$ triple bonds do not exist except for carbon monoxide, which has a very short, and strong bond (112.8 pm).