Question

Correct order of resonance stabilization in $H_{2}C{O}_3$ and $C{O}_3^{2-}$ is:

• A. $C{O}_3^{2-}>H_{2}C{O}_3$
• B. $C{O}_3^{2-}<H_{2}C{O}_3$
• C. $C{O}_3^{2-}=H_{2}C{O}_3$
• D. None of these

Answer 1

The correct option is A $C{O}_3^{2-}>H_{2}C{O}_3$

Carbonate ion$\left(C{O}_3^{-2}\right)$ has greater resonance stabilization than carbonic acid.

Carbonate ion resonance structures:

Carbonic acid does not have resonance structures.

So, the correct option is A.