Question

The correct increasing order of C - O bond lengths among $CO,C{O}_3^{2-}$ and $C{O}_2$ is

• A. $C{O}_3^{2-}<C{O}_2<CO$
• B. $C{O}_2<C{O}_3^{2-}<CO$
• C. $CO<C{O}_3^{2-}<C{O}_2$
• D. $CO<C{O}_2<C{O}_3^{2-}$

Answer 1

The correct option is D $CO<C{O}_2<C{O}_3^{2-}$

Due to resonance single bond acquires double bond character and double bond acquires single bond character, and triple bond is shortest followed by double bond and single bond. Therefore answer is D $CO<C{O}_2<C{O}_3^{2-}$