The correct order of increasing $C - O$ bond length of $CO, CO_3^{2-}, CO_2$ is

Explain the important aspects of resonance with reference to the $CO_{3}^{2-}$ ion.

What is resonance energy?

Write the resonance structures of $CH_2=CH-CHO$. Indicate the relative stability of the contributing structures.

In benzene, the $C-C$ bond lengths are equal between all carbons because of...

$CH_3-C(=O)-OCH_3$. In the given structure,the bond between carbonyl carbon and oxygen is $a$ and the bond between oxygen and methyl group is $b$. The correct relation between the bond lengths $a$ and $b$ is: