Question

Rank the following bonds of $C{O}_3^{2-}$ in decreasing order of their bond length

• A. $I>II>III$
• B. $III>II>I$
• C. $I=II=III$
• D. $II=III>I$

Answer 1

The correct option is C $I=II=III$

Resonating structures of $C{O}_3^{2-}$ is as follows :
All the three resonating structures of $C{O}_3^{2-}$ are equivalent resonating structures.
So all the $C-O$ bond lengths will be equal.
Correct order is :
$I=II=III$
Resonance hybrid of $C{O}_3^{2-}$ is :